Reward is its own virtue.
One of the first principles of perseverance is to know when to stop persevering.
Patriotism covers a multitude of sins.
Society's the mother of convention.
When I feel that I'm going to write a detective story, I buy a five pound box of chocolates and a ream of paper. When the candy is all gone and the paper all used up, I know that the book is long enough.
Almost before the big motor-car stopped, the girl sprang out.