The dog that trots about finds a bone.
If you're going through hell, keep going.
Only the educated are free.
Be thine own palace, or the world's thy jail.
Without hard work, nothing grows but weeds.
Leap, and the net will appear.
If you can dream it, you can do it.
The wise does at once what the fool does at last.
Know or listen to those who know.
I can, therefore I am.
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.