I can, therefore I am.

It's always too early to quit.

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

What you do today can improve all your tomorrows.

Never complain and never explain.

Begin to be now what you will be hereafter.

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

If you're going through hell, keep going.

To know oneself, one should assert oneself.