Expect problems and eat them for breakfast.
Never complain and never explain.
Be thine own palace, or the world's thy jail.
What you do today can improve all your tomorrows.
I can, therefore I am.
Be gentle to all and stern with yourself.
If you can dream it, you can do it.
Well done is better than well said.
To know oneself, one should assert oneself.
If you're going through hell, keep going.
It's amazing that something only an atom thick can be an impenetrable barrier. You can have gas on one side and vacuum or liquid on the other, and with a wall only one atom thick, nothing would go through it.