Why Do We Still Believe in Jesus?

What would you say if someone challenged your belief in Jesus by asking why? This world is going to give you plenty of reasons why NOT to believe: You're going to be told that believing in Jesus puts you on the wrong side of history, makes you old-fashioned, outdated, and boring, and includes you with hypocrites. You're going to be challenged for believing in fairy tales and confronted with injustice and suffering in a world supposedly ruled by a God who claims to be good and powerful. So why? Why still believe in Jesus?