I can, therefore I am.

The dog that trots about finds a bone.

What you do today can improve all your tomorrows.

If you're going through hell, keep going.

If you think you can do it, you can.

Either you run the day or the day runs you.

It's always too early to quit.

To know oneself, one should assert oneself.

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