I can, therefore I am.

It's always too early to quit.

Be gentle to all and stern with yourself.

To be a good loser is to learn how to win.

Do not weep do not wax indignant. Understand.

Things do not happen. Things are made to happen.

Expect problems and eat them for breakfast.

The dog that trots about finds a bone.

To know oneself, one should assert oneself.