Who said "The stupidest thing one can do is to declare: I am wise."?

This quote is attributed to Anton Chekhov.

The stupidest thing one can do is to declare: I am wise. - Anton Chekhov

"The stupidest thing one can do is to declare: I am wise."

Anton Chekhov Wisdom

Playwright Novelist Russian 1860–1904

"Man will become better when you show him what he is like."

"Any idiot can face a crisis, it is the day to day living that wears you out."

"If you fear something, you give it power over you."

"Don't tell me the moon is shining; show me the glint of light on broken glass."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."