Atlas's curse

"If it were so easy, he would have escaped long ago. No, my son. The curse of the sky can only be forced upon a Titan, one of the children of Gaia and Ouranous. Anyone else must choose to take the burden of their own free will. Only a hero, someone with strength, a true heart, and great courage, would do such a thing. No one in Kronos's army would dare try to bear that weight, even upon pain of death."