If you can dream it, you can do it.
If you're going through hell, keep going.
It's always too early to quit.
Always desire to learn something useful.
The wise does at once what the fool does at last.
Without hard work, nothing grows but weeds.
If you've got a talent, protect it.
Well done is better than well said.
Know or listen to those who know.
Things do not happen. Things are made to happen.
They can shout down the head of the physics department at Cal Tech.
He's a novice, but he's had these - he's experienced in leadership in tight circumstances. He started - he dropped the first bomb, led the first air strike into North Vietnam.