[It] is based simply upon a profound belief in the pervasiveness of ideas. What is today a matter of academic speculation begins tomorrow to move armies and pull down empires. In that second stage, it has gone too far to be combated; the time to stop it was when it was still a matter of impassionate debate. So as Christians we should try to mold the thought of the world in such a way as to make the acceptance of Christianity something more than a logical absurdity.