In this book, Crazy Love, Francis Chan (the author) is interviewed at the end with the question: "Do you think God calls you to live a radical, crazy life?"
"It's not that this lifestyle should be crazy to us. It should be the only thing that makes sense. Giving up everything and sacrificing everything we can for the afterlife is logical. "Crazy" is living a safe life and storing up things while trying to enjoy our time on earth, knowing that any millisecond God could take your life. To me that is crazy, and that is radical. The crazy ones are the ones who live life like there is no God. To me that is insanity."