Offer good for a limited time only. Don't call us, we'll call you. If it ain't broke, don't fix it. An apple a day keeps the doctor away. An onion a day keeps everyone else away.
Loose lips sink ships.
In the jungle, the mighty jungle, the Lion sleeps tonight. Entities should not be multiplied needlessly. The square of the hypotenuse is equal to the sum of the squares of the two sides. I mean it.