Always desire to learn something useful.
Leap, and the net will appear.
It's always too early to quit.
By failing to prepare, you are preparing to fail.
Never complain and never explain.
What you do today can improve all your tomorrows.
If you think you can do it, you can.
Do not weep do not wax indignant. Understand.
Problems are not stop signs, they are guidelines.
Know or listen to those who know.
I spent every night until four in the morning on my dissertation, until I came to the point when I could not write another word, not even the next letter. I went to bed. Eight o'clock the next morning I was up writing again.