Know or listen to those who know.
Quality is not an act, it is a habit.
If you're going through hell, keep going.
You never know what motivates you.
Go for it now. The future is promised to no one.
The most effective way to do it, is to do it.
The wise does at once what the fool does at last.
Problems are not stop signs, they are guidelines.
To be a good loser is to learn how to win.
Begin to be now what you will be hereafter.
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.