Who said "One must always strive to be better than before."?

This quote is attributed to Waylon Smithers.

One must always strive to be better than before. - Waylon Smithers

"One must always strive to be better than before."

Waylon Smithers Perseverance

"Mr. Burns is a great man, and I would do anything for him."

"The key to success is hard work and dedication to your employer."

"I live for the moment when Mr. Burns needs me."

"Love is wonderful, but duty comes first."

"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."