I can, therefore I am.

To know oneself, one should assert oneself.

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

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

It's always too early to quit.

Go for it now. The future is promised to no one.

Be gentle to all and stern with yourself.

The dog that trots about finds a bone.

By failing to prepare, you are preparing to fail.