If Jesus Didn't Rise, Why Bother About Him?

“If Jesus rose from the dead, then you have to accept all that he said; if he didn't rise from the dead, then why worry about any of what he said? The issue on which everything hangs is not whether or not you like his teaching but whether or not he rose from the dead.”  ― Timothy Keller, The Reason for God: Belief in an Age of Skepticism