To know oneself, one should assert oneself.

Know or listen to those who know.

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

If you're going through hell, keep going.

Never complain and never explain.

The dog that trots about finds a bone.

Expect problems and eat them for breakfast.

The wise does at once what the fool does at last.

By failing to prepare, you are preparing to fail.