The man who has a girl in every port is not a sailor but a wholesaler.
The best way to spoil a good story is by sticking to the facts.
Hindsight is good, foresight is better; but second sight is best of all.
A creature that never cries over spilt milk: a cat.
The mint makes it first, it is up to you to make it last.
There would be no population explosion if people who are trying to keep the wolf from the door wouldn't let the stork fly in through the window.