It's always too early to quit.

Things do not happen. Things are made to happen.

Without hard work, nothing grows but weeds.

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

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

By failing to prepare, you are preparing to fail.

The most effective way to do it, is to do it.

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

The dog that trots about finds a bone.