To understand a program you must become both the machine and the program.
The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.
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.
No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.