Originally Posted by MS Fowler

Christianity knows nothing of a "blind leap of faith"/ We have our friend Kierkegaard to thank for that little gem.

Biblical faith is always based on something--it is not blind. It is based on the authority of the Scriptures, on the Person revealed there who is the Creator-God.
It may seem a blind leap to non-believers, but to Christians it is not.

I have heard it explained like this---Suppose you are hikng an unfamiliar mountain, and a thick fog settles in. It is getting cold and there is danger of hypothermia; you need to find shelter.
2 alternatives---
1) You imagine that there is a ledge below you with a sheltering cave in it. You leap off the side of the mountain to find this ledge and its shelter. THAt is the blind leap of faith.
2) From out of the fog comes a voice, load and clear. The voice says, " I have been watching you through my telescope, I know where you are. I have hiked on this mountain 50 years as a man and a boy, I know this mountain. Just below you, on the side of the mountain is a large ledge with a cave that will provide you with shelter. To reach the safety of the cave you need to jump off the trail,. You cannot miss the ledge; I have used this very cave many times." The leap in this case is still a leap of faith, but it is not blind. It is based on a relationship with someone who knows what you cannot possible know. This type of faith is more like biblical faith.
It really comes down to a matter of authority.... Are the Scriptures of the Old and New Testaments to be relied upon as the only rule of faith and practice, or are they not? The choice is yours. All your arguing comes after you made that first decision.