One of the most profound holes I find in conservative Christianity is the lack of wonder at what Jesus Christ was doing before His physical birth as Jesus of Nazarene. Many, too many to list, biblical passages clearly show that Christ existed in some form since the beginning of time, and for as long as Earth has existed.
Now yes, the Bible does not provide a detailed list of what Jesus was doing for all those thousands and thousands of years of human history. It talks more of His presence in the heavenly realm. However, I find it very hard to imagine that in all that time, He never interacted in one form of another with mankind. Or at the very least inspired people - and possibly certain beliefs. As in, could it not be possible that at least some, not all, but at least some of the religions and beliefs before Christianity could have been touched by Christ in some form or another? Not at all saying any were perfect or pure, but some aspects of them could have been a shadow, or a hint, of the real truth. Comparing and analyzing different religions certainly shows some, keyword some, striking similarities.
I find it hard to believe that whatever Christ was doing in heaven, when it comes specifically to his earthly involvement, he was sitting on the sidelines all the way until his birth in Bethlehem.
Of course, this is very controversial, because even the hint that there could be truth outside of what is commonly known as Christianity opens up a big Pandora's box that does not sit well with conservatism.