Problems are not stop signs, they are guidelines.
What you do today can improve all your tomorrows.
To know oneself, one should assert oneself.
Well done is better than well said.
I can, therefore I am.
Things do not happen. Things are made to happen.
Quality is not an act, it is a habit.
Be thine own palace, or the world's thy jail.
Never complain and never explain.
Leap, and the net will appear.
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.