Many sane, educated and generally trustworthy people claim not only that God exists but also that they have genuine knowledge, including justified true belief, that God exists. Because claims are typically cheap and easy, however, the claim to know that God exists will prompt the following response, usually sooner rather than later: How do they know? ¶ This common four-word question, although irksome at times, is perfectly intelligible and even valuable, as far as it goes. It seeks an explanation of how the belief that God exists exceeds mere belief, or opinion, and achieves the status of genuine knowledge. In particular, this question typically seeks an explanation of how, if at all, the belief that God exists is grounded, justified, reasonable, or evidence-based regarding affirmations of truth. ¶ A plausible goal behind our four-word question is, at least for many inquirers, to acquire truth in a manner that includes an adequate indication of true belief. These truth-seeking inquirers aim not only to avoid false belief and lucky guesswork, but also to minimize the risk of error in their beliefs (at least in a way befitting to the acquisition of truth). We should aim for the same, as people who seek truth but who are faced sometimes with facts and other realities at odds with our opinions. In seeking truth about God’s existence, in particular, we thus should seek truth based on evidence for God’s reality. Such evidence, if available, would indicate that it is true that God exists, or (in other words) that God is real rather than fictional.
"Authority of Scripture, Tradition, and the Church", in The Oxford Handbook of Philosophical Theology, Thomas P. Flint and Michael Rea, eds. (Oxford University Press: 2009), p. 11.
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Christianity, Islam, and Judaism all claim that God has given humans a revelation. Divine revelation may be either of God, or by God of propositional truth. Traditionally Christianity has claimed that the Christian revelation has involved both of these. God revealed himself in his acts in history; for example in the miracles by which he preserved the people of ancient Israel, and above all by becoming incarnate (that is human) as Jesus Christ, who was crucified and rose from the dead. And God also revealed to us propositional truths by the teaching of Jesus and his church. Some modern theologians have denied that Christianity involves any propositional revelation, but there can be little doubt that from the second century (and in my view from the first century) until the eighteenth century, Christians and non-Christians were virtually unanimous in supposing that it claimed to have such a revelation, and so it is worthwhile investigating its traditional claim. It is in any case very hard to see how it would be of great use to us for God to reveal himself in history (e.g. in the Exodus, or in the life, death, and resurrection of Jesus) unless we could understand the cosmic significance of what happened — e.g. that Jesus was God incarnate and that his life and death constituted an atonement for our sins. And how are we to know that unless with the history God provides its interpretation?
In October 2001 there was an incident reported in the local news that tipped my perspective farther from deism toward an atheistic-leaning agnosticism. A driver struck a pedestrian on a freeway in Fort Worth and continued the journey home, parking in the garage with the victim still on the hood of the car. The victim was conscious and pled for help, but the driver simply left him there for four days until he died, then with the help of a friend, dumped the body in a local park. The universal reaction to this incident was one of shock and outrage. Yet as I considered the millions of children who have died of starvation, wasting disease, and natural disasters, knowing that an omnipotent god could have come to their rescue in response to their pleas but did not, it was difficult not to see a parallel between God and the negligent driver. The more I contemplated the world in which we live, the harder it became to identify any clues that a benevolent, omnipotent Personality intervenes and orchestrates any of the events in our lives.
"The Argument from Reason" in The Blackwell Companion to Natural Theology, William Lane Craig and J.P. Moreland, eds. (Wiley-Blackwell: 2009), pp. 379-80.
It is not enough that one mental event cause another mental event in virtue of its propositional content. Someone who engages in rational inference must recognize the correctness of the principle of sound reasoning, which one applies to one’s inference. Modus Ponens works, affirming the consequent does not. Our inferences are supposed to be governed by the rules of reasoning we recognize to be correct. However, can these rules of inference ever really govern our reasoning process? According to physicalism, all of our reasoning processes are the inevitable result of a physical substrate that is not governed by reasons. ¶ So we might ask this question: “Which laws govern the activity we call rational inference?” We might stipulate, for the purposes of this discussion, the idea that laws of physics are accounts of the powers and liabilities of the objects in question. If the materialist claims that laws other than the laws of physics apply to the assemblage of particles we call human beings, then those particles are not what (mechanistic) physics says they are, and we have admitted a fundamental explanatory dualism. If however, the laws are the laws of physics, then there are no powers and liabilities that cannot be predicted from the physical level. If this is so there can be a sort of emergence, in that the basic laws governing a sleeping pill will not mention that the pills tend to put you to sleep. Nevertheless, the pill’s soporific effectiveness can be fully and completely analyzed in terms of its physical powers and liability. If this is so, then we will be rational if and only if the physical configurations of matter guarantee that we are physical, and in the last analysis, the laws of logic do not govern our intellectual conduct.
Atheists often claim that religion fuels aggressive wars, both because it exacerbates antagonisms between opponents and also because it gives aggressors confidence by making them feel as if they have God on their side. Lots of wars certainly looks as if they are motivated by religion. Just think about conflicts in Northern Ireland, the Middle East, the Balkans, the Asian subcontinent, Indonesia, and various parts of Africa. However, none of these wars is exclusively religious. They always involve political, economic, and ethnic disputes as well. That makes it hard to specify how much role, if any, religion itself had in causing any particular war. Defenders of religion argue that religious language is misused to justify what warmongers wanted to do independently of religion. This hypothesis might seem implausible to some, but it is hard to refute, partly because we do not have enough data points, and there is so much variation among wars. In any case, the high number of apparently religious wars at least suggests that secular societies are unlikely to be more prone to murder in war.
The existence of our universe might be explained by scientific cosmology, but such an explanation would still have to refer to features of some larger reality that contained or gave rise to it. A scientific explanation of the Big Bang would not be an explanation of why there was something rather than nothing, because it would have to refer to something from which that event arose. This something, or anything else cited in a further scientific explanation of it, would then have to be included in the universe whose existence we are looking for an explanation of when we ask why there is anything at all. This is a question that remains after all possible scientific questions have been answered.
Reason, Faith, and Revolution (Yale University Press: 2009), pp. xi-xii.
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Religion has wrought untold misery in human affairs. For the most part, it has been a squalid tale of bigotry, superstition, wishful thinking, and oppressive ideology. I therefore have a good deal of sympathy with its rationalist and humanist critics. But it is also the case, as this book argues, that most such critics buy their rejection of religion on the cheap. When it comes to the New Testament, at least, what they usually write off is a worthless caricature of the real thing, rooted in a degree of ignorance and prejudice to match religion's own... If the agnostic left cannot afford such intellectual indolence when it comes to the Jewish and Christian Scriptures, it is not only because it belongs to justice and honesty to confront your opponent at his or her most convincing. It is also that radicals might discover there some valuable insights into human emancipation, in an era where the political left stand in dire need of good ideas. I do not invite such readers to believe in these ideas, any more than I myself believe in the archangel Gabriel, the infallibility of the pope, the idea that Jesus walked on water, or the claim that he rose up into heaven before the eyes of his disciples. If I try in this book to "ventriloquize" what I take to be a version of the Christian gospel relevant to radicals and humanists, I do not wish to be mistaken for a dummy. But the Jewish and Christian scriptures have much to say about some vital questions — death, suffering, love, self-dispossession, and the like — on which the left has for the most part maintained an embarrassed silence. It is time for this politically crippling shyness to come to an end.
"The Argument from Reason" in The Blackwell Companion to Natural Theology (Wiley-Blackwell: 2009), p. 386
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So, I would maintain that there are gaps and there are gaps. It is not just pointing to an unsolved engineering problem in nature. First of all, the categories of the mental and the physical are logically incompatible categories. You start attributing mental properties to physics and you might end up being told that you are no longer describing the physical at all. Purpose, normativity, intentionality, or aboutness, all these things are not supposed to be brought in to the physical descriptions of things, at least at the most basic level of analysis. ¶ Let us consider the gap between the propositional content of thought and the physical description of the brain. My claim is that no matter in how much detail you describe the physical state of the brain (and the environment), the propositional content of thought will invariably be undetermined. ... As I see it, it is not a matter of getting a physical description that will work. In my view, the logicoconceptual gap is always going to be there regardless of how extensively you describe the physical. As I said earlier, bridging the chasm is not going to simply be a matter of exploring the territory on one side of the chasm. ... [T]he "God of the gaps" or even a "soul of the gaps" response to the argument from reason does not work. I am not saying that we just cannot figure out right now why the mental states involved in rational inference are really physical, I am suggesting on principled grounds that a careful reflection on the nature of mind and matter will invariably reveal that there is a logical gap between them that in principle cannot be bridged without fudging categories.
When a society rejects the idea of God, it tends to transcendentalize alternatives — such as the ideals of liberty or equality. These now become quasi-divine authorities, which none are permitted to challenge. ¶ Perhaps the most familiar example of this dates from the French Revolution, at a time when traditional notions of God were discarded as obsolete and replaced by transcendentalized human values. In 1792 Madame Rolande was brought to the guillotine to face execution on trumped-up charges. As she prepared to die, she bowed mockingly toward the statue of liberty in the Place de la Révolution and uttered the words for which she is now remembered: “Liberty, what crimes are committed in your name.” Her point is simple, and I believe it to be irrefutable. All ideals — divine, transcendent, human or invented — are capable of being abused. That’s just the way human nature is. And knowing this, rather than lashing out uncritically at religion, we need to work out what to do about it. The problem lies in human nature.
Jesus, unlike most responsible American citizens, appears to do no work, and is accused of being a glutton and a drunkard. He is presented as homeless, propertyless, celibate, peripatetic, socially marginal, disdainful of kinsfolk, without a trade, a friend of outcasts and pariahs, averse to material possessions, without fear for his own safety, careless about purity regulations, critical of traditional authority, a thorn in the side of the Establishment, and a scourge of the rich and powerful. Though he was no revolutionary in the modern sense of the term, he has something of the lifestyle of one. He sounds like a cross between a hippie and a guerilla fighter. He respects the Sabbath not because it means going to church but because it represents a temporary escape from the burden of labor. The Sabbath is about resting, not religion. One of the best reasons for being a Christian, as for being a socialist, is that you don’t like having to work, and reject the fearful idolatry of it so rife in countries like the United States. Truly civilized societies do not hold predawn power breakfasts.