It's always too early to quit.

Without hard work, nothing grows but weeds.

To know oneself, one should assert oneself.

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

Be gentle to all and stern with yourself.

The secret of getting ahead is getting started.

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

Expect problems and eat them for breakfast.

By failing to prepare, you are preparing to fail.