Who said "I've never looked back—only forward."?

This quote is attributed to Yellowjacket.

I've never looked back—only forward. - Yellowjacket

"I've never looked back—only forward."

Yellowjacket

"You know, I'm something of a scientist myself."

"Power is the only truth that matters in this world."

"I didn't claw my way to the top just to be replaced by some washed-up has-been."

"Size doesn't determine strength—ambition does."