Who said "Mistakes are the portals of discovery."?

This quote is attributed to Laurel and Hardy.

Mistakes are the portals of discovery. - Laurel and Hardy

"Mistakes are the portals of discovery."

Laurel and Hardy

Slapstick Comedy Duo British-American 1890–1965

"Well, here's another nice mess you've gotten me into!"

"The basis of comedy is not laughter, but sorrow."

"We are here on Earth to help others; what the others are here for, I don't know."

"A fine friendship is the finest thing in the world."