I can, therefore I am.
To know oneself, one should assert oneself.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
If you're going through hell, keep going.
The secret of getting ahead is getting started.
Be gentle to all and stern with yourself.
The dog that trots about finds a bone.
Either you run the day or the day runs you.
To be a good loser is to learn how to win.
Triumphant science and technology are only at the threshold of man's command over sources of energy so stupendous that, if used for military purposes, they can wipe out our entire civilization.