"Good judgement comes from experience, and experience comes from bad judgement."
-Variously attributed, one version from Will Rogers

Will Rogers is as good an attribution, as anyone else on this planet...him, or Sam Clemens...

By the way...I have this fence that needs a whitewash....

"Wisdom is the booby prize
We get for being less than wise."
Piet Hein
Grooks

"who are you men in rotten clothes and ragged beards?

We are the Pilgrims, master,
We shall go always a little further: it may be
Beyond the last blue mountain barred with snow,
Across that angry or that glimmering sea,
White on a throne or guarded in a cave,
There lives a prophet who can understand,
Why men were born: but surely we are brave,
Who make the Golden Journey to Samarkand

"The Pilgrim", James E Flecker
inscribed on the Clock Tower, 22nd SAS

A good quote should be pithy . Too wordy and it loses its punch. But that's just an opinion.

"Don't talk unless you can improve on silence." -- George Will

Yeth,indeed.

"You can check out anytime you like, but you can never leave." -- The Night Man, who says "Relax!"

That's a line from the 1977 Eagles song "Hotel California", written by Don Felder, Don Henley, and Glenn Frey. That line is mentioned in the wikipedia page for Hotel California.

"Learning is Not Compulsory…Neither is Survival"
— W. Edwards Deming

A few that I have been influenced by over the years:

People will believe anything you say if you tell them that Benjamin Franklin said it first.

Never attribute to malice anything that is more easily explained by stupidity.

99% of all human wisdom consists of a willingness to keep your mouth shut. – Albert Einstein

You are entitled to your own opinion. You are not entitled to your own facts. – Carl Sagan

Don't let yesterday use up too much of today.

Opportunity is missed by most people because it arrives in overalls and looks like work. – Thomas Edison

When you are going through Hell, keep going. – Winston Churchill

All generalizations are false, including this one. – Otto Koppen

Pick your battles big enough to matter, small enough to win. – Jonathan Kozol

There is always an easy solution to every human problem–neat, plausible and wrong. – H. L. Mencken

Panic is what happens when you run out of training. – Sandy Stevens

With all your getting, get understanding. – Proverbs 4:7