Who said "Patience is the virtue of the truly powerful."?

This quote is attributed to Frasier Crane.

Patience is the virtue of the truly powerful. - Frasier Crane

"Patience is the virtue of the truly powerful."

Frasier Crane Patience

"I'm listening."

"Tossed salad and scrambled eggs."

"It's a Frasier kind of day."

"Excelsior!"

"Patience is a virtue I'm still learning."

"I may be a redhead, but I'm not a hothead."

"Patience is a virtue."

"Patience is a virtue I never learned."