I can, therefore I am.

Be gentle to all and stern with yourself.

If you've got a talent, protect it.

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

If you're going through hell, keep going.

By failing to prepare, you are preparing to fail.

If you think you can do it, you can.

To know oneself, one should assert oneself.

Problems are not stop signs, they are guidelines.