Who said "My failures only serve to strengthen my resolve."?

This quote is attributed to Dr. Robotnik.

My failures only serve to strengthen my resolve. - Dr. Robotnik

"My failures only serve to strengthen my resolve."

Dr. Robotnik Perseverance

"I am the world's greatest scientific genius!"

"Sonic, you blue pest, I'll get you yet!"

"Roboticize the world!"

"Science is the key to ultimate power."

"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."