If you've got a talent, protect it.
Be thine own palace, or the world's thy jail.
The dog that trots about finds a bone.
It's always too early to quit.
Never complain and never explain.
The wise does at once what the fool does at last.
Well done is better than well said.
Go for it now. The future is promised to no one.
Expect problems and eat them for breakfast.
Be kind whenever possible. It is always possible.
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.