Phillip E. Johnson on Rationality, or the Lack ThereofThe Wedge of Truth (Downers Grove, IL: InterVarsity Press, 2000), p. 36.
We all like to believe we are more rational than we really are. The painful truth is that we are naturally inclined to believe what we want to believe, and we may adopt some fashionable intellectual scheme because it allows us to feel superior to other people, especially those unenlightened masses who need the crutch or the discipline of religion. Of course people may also adopt a religious creed in order to justify themselves, especially in times or places where religion is fashionable. Everybody is subject to the temptation to rationalize. The temptation is probably greatest for those with the most intelligence because the more intelligent we are, the easier we will find it to invent convenient rationalizations for what we want to believe and to decorate them with high-sounding claptrap. Unless we take the greatest precautions, we will use our reasoning powers to convince ourselves to believe reassuring lies rather than the uncomfortable truths that reality may be trying to tell us.