No man is rich enough to buy back his past. The reason why worry kills more people than work is that more people worry than work. Science without religion is lame, religion without science is blind. Few are those who see with their own eyes and feel with their own hearts. In the middle of difficulty lies opportunity.
Imagination is more important than knowledge.
Anyone who has never made a mistake has never tried anything new. Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. I want to know God's thoughts. The rest are details. I never think of the future - it comes soon enough.