Naturally, as a Christian Kvetch, my favorite philosopher/theologian is Soren Kierkegaard. Here is one of my favorite Kierkegaard quotes:

"The matter is quite simple. The Bible is very easy to understand. But we Christians are a bunch of scheming swindlers. We pretend to be unable to understand it because we know very well that the minute we understand, we are obliged to act accordingly. Take any word in the New Testament and forget everything except pledging yourself to act accordingly. My God, you will say, if I do that my whole life will be ruined. How would I ever get on in the world? Herein lies the real place of Christian scholarship. Christian scholarship is the Church's prodigious invention to defend itself against the Bible, to ensure that we can continue to be good Christians without the Bible coming too close. Oh, priceless scholarship, what would we do without you? Dreadful it is to fall into the hands of the living God. Yes, it is even dreadful to be alone with the New Testament. "

--Soren Kierkegaard, Provocations: Spiritual Writings of Kierkegaard, ed. Charles E. Moore (Farmington, PA: Plough, 2002), 201