Quotes: Power at a Price

Ares: "You cannot save them Kratos. You gave them up in your quest for ultimate power. There is a price to pay for everything you gain."
Kratos: "Not that price... I didn't want them to die."
Ares: "No price is too high for what I OFFERED!"

"All magic comes with a price!"
Rumpelstiltskin's Catch Phrase, Once Upon a Time

Whomsoever takes up this blade shall wield power eternal. Just as the blade rends flesh, so must power scar the spirit.
— Inscription on Frostmourne's pedestal, Warcraft III: Reign of Chaos