Quality is not an act, it is a habit.
You never know what motivates you.
Begin to be now what you will be hereafter.
Well done is better than well said.
Things do not happen. Things are made to happen.
If you think you can do it, you can.
Never complain and never explain.
Be gentle to all and stern with yourself.
The secret of getting ahead is getting started.
What you do today can improve all your tomorrows.
That is a secondary teacher conception - the writer as an observer.