Will We Be Capable of Sinning in Heaven?

People have said, “Heaven will be perfect, but a sinless environment doesn’t mean we can’t sin; Adam and Eve proved that. They lived in a sinless place, yet they sinned."
It's true that Satan tempted them, but he too originally was a perfect being living in a perfect environment, beholding God himself. Not only was there no sin in Heaven; there was no sin in the universe. Yet Satan sinned. Hence, Heaven's perfection, it seems, doesn't guarantee there'll be no future sin.