Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work.
The best way to predict the future is to create it.
"I must say a word about fear. It is life's only true opponent. Only fear can defeat life."
The joy is in the journey, not just the destination.
The real challenge in computer science is not to write programs, but to understand the nature of computation.