Be gentle to all and stern with yourself.
Without hard work, nothing grows but weeds.
The secret of getting ahead is getting started.
Be thine own palace, or the world's thy jail.
Wherever you are - be all there.
Well done is better than well said.
It's always too early to quit.
Leap, and the net will appear.
Quality is not an act, it is a habit.
Never complain and never explain.
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.'