Sadhu Sundar Singh
While I was in Tibet, A Buddhist monk, had lived for five or six years in a cave. When he went into the cave he had good eyesight. But because he stayed so long in the darkness his eyes grew weaker and weaker, and at last he became quite blind. It is just the same with us. If we do not use the blessings which we have received from God for His Glory, we are in danger of losing them for ever.