I can, therefore I am.

If you can dream it, you can do it.

Be gentle to all and stern with yourself.

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

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

The dog that trots about finds a bone.

If you're going through hell, keep going.

Things do not happen. Things are made to happen.

By failing to prepare, you are preparing to fail.