Here’s a great line that has to do with the Christian mind and the joy found in Christianity. It is from Francis Schaeffer’s book, The God Who Is There.
“When we understand our calling, it is not only true, but beautiful – and it should be exciting. It is hard to understand how an orthodox, evangelical, Bible-believing Christian can fail to be excited. The answers in the realm of the intellect should make us overwhelmingly excited. But more than this, we are returned to a personal relationship with the God who is there. If we are unexcited Christians, we should go back and see what is wrong” (p. 190).