Who said "You cannot stop what has already begun."?

This quote is attributed to Doomsday.

You cannot stop what has already begun. - Doomsday

"You cannot stop what has already begun."

Doomsday Power

"I am the thing that darkness fears."

"Destruction is the only truth I know."

"I grow stronger with every battle."

"Your weapons are meaningless against me."

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."