I've been reading through Lesslie Newbigin's book The Gospel in a Pluralist Society, and there are just so many great thoughts in there that I just had to share some with you: [note: I've edited this quotation to include a crucial "not" that I had accidentally left out.]

"The Christian believer is using the same faculty of reason as his unbelieving neighbor and he is using it in dealing with the same realities, which are those with which every human being has to deal. But he is seeing them in a new light, in a new perspective. They fall for him into a different pattern. He cannot justify the new pattern in terms of the old; he can only say to his unbelieving neighbor, stand here with me and see if you don't see the same pattern as I do...

It is essential to the integrity of our witness to this new reality that we recognize that to be its witnesses does not mean to be the possessors of all truth. It means to be placed on the path by following which we are led toward the truth. There is indeed a proper place for agnosticism in the Christian life. There is a true sense in which we are - with others - seekers after the truth... When Christians affirm, as they do, that Jesus is the way, the true and living way by whom we come to the Father (John 14:6), they are not claiming to know everything. They are claiming to be on the way, and inviting others to join them as they press forward toward the fullness of the truth, toward the day when we shall know as we have been known."