It’s a combination of “people who live in glass houses shouldn’t throw stones” and “let he who is without sin cast the first stone”. I giggled. 
Tis better to have loved two birds in the bush than never to have cried over spilled milk.
These days, I say, “Is water wet? Is the Pope German?”
“People who live in grass houses shouldn’t stow thrones.”
I’m burning the midnight candle at both ends against the middle.
My teacher used to say, when something was completely accurate, “dead on the money.”
But… but I really do say we should up the screwing.
Someone should have told Paula Radcliffe to…
“Leak before you lope”
What would I know though?
I’m just a prawn in the game…
Let sleeping dogs bury the dead.
Wine heals all wounds.
There is no fuel like a old fuel.
Ragnarok is bliss.
Nothing is certain, except death and taxis.
Red spy at night, Turkish delight.
Political power grows out of a barrel organ.
What happens in vagueness, stays in vagueness.
A nerd is as good as a twinkie to a deaf goat.
Don’t look for a gift in a horse’s mouth.
I have a friend who has a very diplomatic way of dealing with gabby people. After they have lost their audience and left the room she sometimes says, “Well, I guess that took the sail out of his wind.”
Hindsight is for assholes.
Or as we say in Thailand: You’re only as old as the girl on the end of your arm.
(But since the wife is only two years younger than I, that still puts me in my 50s. :()
Ah, I see. The saying made perfect sense to me - no throwing stones in glass houses.
Ignorance is blessed.
That was said to me by someone who must be the most blessed person ever. 
Time wounds all heels.
Phobody’s Nerfect.
Melody, the ditzy blonde bombshell from the Josie & The Pussycats comic book did this as a regular schtick.
Which I read as Dead on the Monkey.
“A bird in the hand is very messy.”
Said by Tony Soprano: “Revenge is like serving cold cuts.”