A few years ago, a former boss of mine, Cedric, gave me Lee Strobel’s book The Case for Christ.  I read it and thought it presented the claims for the validity of Christianity very well. A movie was recently released about the book and it gave information about Mr. Strobel’s conversion to Christianity that is not included in the book (either that or I have forgotten about it in the intervening years). One such bit of information was a conversation Mr. Strobel had with an atheist friend of his. His friend, Ray, stated:
At some point, young man, you’re going to have to plant your flag on a mountain of uncertainty where not every question is answered. The human mind will never get to the bottom of every mystery in the cosmos. Believing in God, not believing in God, either way still takes a leap of faith. 
The human condition, the way God made us, means that we are finite. Being finite means our ability to know what is true is limited. Ray is right. Every one of our questions about life and the universe will not be answered and that includes our questions about the validity of Christianity. So why would God make believing in Jesus a condition for our salvation when that is something we cannot know for certain?
All the Christian theologians and philosophers know the above facts. A few will state such in the books they write.  So why is not the Christian community discussing this issue in order to resolve it?
 Lee Strobel, The Case for Christ, Grand Rapids, MI: Zondervan Publishing House, 1998.
 Adam R. Holz as quoted in Plugged In Magazine, Tulsa Beacon, April 13, 2017, p. 1B.
 William Lane Craig, Reasonable Faith, Wheaton, IL: Crossway, 2008, p. 55.