Be thine own palace, or the world's thy jail.
Well done is better than well said.
Things do not happen. Things are made to happen.
It's always too early to quit.
Never complain and never explain.
Begin to be now what you will be hereafter.
Who seeks shall find.
Do not weep do not wax indignant. Understand.
If you're going through hell, keep going.
You never know what motivates you.
As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.
Whenever anyone says, 'theoretically,' they really mean, 'not really.'