It's always too early to quit.
Begin to be now what you will be hereafter.
Be thine own palace, or the world's thy jail.
Things do not happen. Things are made to happen.
Always desire to learn something useful.
Who seeks shall find.
Be gentle to all and stern with yourself.
You never know what motivates you.
By failing to prepare, you are preparing to fail.
Expect problems and eat them for breakfast.
When I was about 13 or 14, I had an English teacher who made a deal with me that I could get out of doing all of the year's regular work if I would write a short story a week and on Friday read it to the class.