Who said "Perseverance is simply refusing to accept defeat."?

This quote is attributed to Frasier Crane.

Perseverance is simply refusing to accept defeat. - Frasier Crane

"Perseverance is simply refusing to accept defeat."

Frasier Crane Perseverance

"I'm listening."

"Tossed salad and scrambled eggs."

"It's a Frasier kind of day."

"Excelsior!"

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."