I can, therefore I am.

To know oneself, one should assert oneself.

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

Without hard work, nothing grows but weeds.

If you can dream it, you can do it.

What you do today can improve all your tomorrows.

It's always too early to quit.

Know or listen to those who know.

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