The two most popular Berra quotes are:
It ain’t over till it’s over.
It’s déjà vu all over again.
Other Berra-isms are:
A nickel ain’t worth a dime anymore.
Always go to other people’s funerals, otherwise they won’t come to yours.
Baseball is ninety percent mental and the other half is physical.
He hits from both sides of the plate. He’s amphibious.
I never said most of the things I said.