If you think you can do it, you can.
Quality is not an act, it is a habit.
Go for it now. The future is promised to no one.
Always desire to learn something useful.
Be thine own palace, or the world's thy jail.
Never complain and never explain.
Begin to be now what you will be hereafter.
Well done is better than well said.
If you've got a talent, protect it.
If you're going through hell, keep going.
Famous remarks are very seldom quoted correctly.