What you do today can improve all your tomorrows.
If you've got a talent, protect it.
The dog that trots about finds a bone.
Go for it now. The future is promised to no one.
Be gentle to all and stern with yourself.
If you're going through hell, keep going.
Either you run the day or the day runs you.
Begin to be now what you will be hereafter.
If you think you can do it, you can.
If you can dream it, you can do it.
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.