If you can dream it, you can do it.
If you think you can do it, you can.
Always desire to learn something useful.
Without hard work, nothing grows but weeds.
Do not weep do not wax indignant. Understand.
Be thine own palace, or the world's thy jail.
The most effective way to do it, is to do it.
You never know what motivates you.
It's always too early to quit.
If you're going through hell, keep going.
The great accomplishment of Jobs's life is how effectively he put his idiosyncrasies - his petulance, his narcissism, and his rudeness - in the service of perfection.