Be gentle to all and stern with yourself.
The most effective way to do it, is to do it.
By failing to prepare, you are preparing to fail.
If you can dream it, you can do it.
If you've got a talent, protect it.
Be kind whenever possible. It is always possible.
To be a good loser is to learn how to win.
Without hard work, nothing grows but weeds.
You never know what motivates you.
Who seeks shall find.
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.