Our reasons for believing Jesus existed and also that He was who He claimed to be - the God who came down - are the same reasons for believing any fact of history: the documentation is substantial and it passes all the tests of historical reliability. Scholars - both liberal and conservative - overwhelming agree that Jesus of Nazareth was a man of history and the Gospels, on the main, tell His story accurately.
Greg KouklChristianity is actually "true Truth," as Francis Schaeffer used to put it. God really does exist, Heaven actually is real (along with Hell), Jesus really did live and He did the things the historical records - the Gospels - say He did, the resurrection of Christ really happened, and there really is hope each of us can count on for "the kind of perfect world our hearts have always longed for."
Greg KouklWorldviews have four elements that help us understand how a person's story fits together: creation, fall, redemption, and restoration. "Creation" tells us how things began, where everything came from (including us), the reason for our origins, and what ultimate reality is like. "Fall" describes the problem (since we all know something has gone wrong with the world). "Redemption" gives us the solution, the way to fix what went wrong. "Restoration" describes what the world would look like once the repair begins to take place.
Greg Koukl