It's always too early to quit.
The wise does at once what the fool does at last.
To be a good loser is to learn how to win.
Never complain and never explain.
Be gentle to all and stern with yourself.
Without hard work, nothing grows but weeds.
To know oneself, one should assert oneself.
Quality is not an act, it is a habit.
You never know what motivates you.
If you've got a talent, protect it.
I don't have the feeling of being motivated by anger, revenge or frustration.