Frankly... I respect that more than a lot of Christians I know who are pretty much illiterate when it comes to the Bible and would be hopeless if required to explain why they believe what they believe.Absolutely. I have an unshakable faith in my core beliefs.
I am not sure that I have ever "doubted" my belief in God and the fundamentals of faith in Christ. But I have taken a critical approach and challenged what I believed. Many things I was taught... changed to align with the Bible more. One of the things intellectually that comforts me about my faith is that it is internally consistent. You can claim the possibility that Christianity is false... that it simply isn't an accurate reflection of reality. However for something to be "true" it must first be consistent with itself. Christianity is.