Be gentle to all and stern with yourself.
Always desire to learn something useful.
Things do not happen. Things are made to happen.
The most effective way to do it, is to do it.
Without hard work, nothing grows but weeds.
I can, therefore I am.
Expect problems and eat them for breakfast.
Be thine own palace, or the world's thy jail.
Never complain and never explain.
Do not weep do not wax indignant. Understand.
That is a secondary teacher conception - the writer as an observer.