If you knew you were going to die tonight, would that cause you to change your use of time today? Most of us would have to say, "Yes, it would." John Krahn had a friend, named Art, whose doctor diagnosed him as having a terminal illness that would claim his life within a year. After a month, the doctor discovered he was mistaken and told Art that his condition was not terminal after all. As Art reflected on the month he had spent under this mistaken death sentence, he acknowledged the negative, painful emotions he had experienced. But there were also some very positive emotions. "I began to see the beauty of God''s creation the way I hadn't seen it before," he said. "With the length of my life limited, I began to make the most of every moment." Making the most of every moment is being a go…