Something that is impossible or nearly impossible -- "like going upstream in a canoe without a paddle."

An expression after eating a really big meal --"I'm full as a tick on a bear's a-- (behind)."

And -- "Don't let the door hit you on the way out!"

Finally --"What you don't know can't hurt you."

"Nothing ventured, nothing gained". This is one of my favorites!

A couple my mother used to say..."You're sharp today. You must have slept in the knife drawer". And... "You'd kick if you were in swimming".

Don't cry over spilled milk.

:mrgreen:

You have 2 chances. Fat and slim!

I don't know that it would be considered old or not but
"Cowboy Up"

If it ain't broke, don't fix it.

"To make a silk purse out of a sow's ear" is to take something not so pretty and make something very pretty from it. We do it all the time when we take "ugly" fabric and make a beautiful quilt.

One of my favorite sayings is

"What takes nerve to ask takes no nerve to refuse"

From my old Nana,"Goodness gracious Godness Agnes!" and "Oh, my sainted Aunt!"

I love, "Go with love and come back safe."