Know or listen to those who know.

I can, therefore I am.

Be thine own palace, or the world's thy jail.

By failing to prepare, you are preparing to fail.

Never complain and never explain.

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

The secret of getting ahead is getting started.

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

To know oneself, one should assert oneself.