Be kind whenever possible. It is always possible.
Be gentle to all and stern with yourself.
Be thine own palace, or the world's thy jail.
If you've got a talent, protect it.
What you do today can improve all your tomorrows.
The secret of getting ahead is getting started.
Well done is better than well said.
You never know what motivates you.
Without hard work, nothing grows but weeds.
If you can dream it, you can do it.
Crabbed and obscure definitions are of no use beyond a narrow circle of students, of whom probably every one has a pet one of his own.