You will never know how much you believe something until it is a matter of life and death. If you think of this world as a place intended simply for our happiness, you find it quite intolerable: think of it as a place of training and correction and it's not so bad. – God in the Dock, page 52.
One of the things that distinguishes man from the other animals is that he wants to know things, wants to find out what reality is like, simply for the sake of knowing. When that desire is completely quenched in anyone, I think he has become something less than human. – God in the Dock, page 108.
Try to exclude the possibility of suffering which the order of nature and the existence of free-wills involve, and you find that you have excluded life itself. – The Problem of Pain