Heaven and hell are not physical locations. Hell is not in the center of the earth and heaven is not floating in the clouds. Heaven and hell are not separate. You can't have heaven without hell and vice versa. Heaven and hell are simply states of our human psyche. They are states of mind, not places. They are both eternal and wholly intertwined. Human never left heaven, he just thinks he did, he's dreaming. The bible says in Genesis 2:21 "And the LORD God caused a deep sleep to fall upon Adam, and he slept:" "Yet the Bible says that a deep sleep fell upon Adam, and nowhere is there reference to his waking up." (https://acim.org/acim/en/s/61#3:6 | T-2.I.3:6). We are literally in heaven but are collectively dreaming that we are in hell. We are asleep and dreaming that we are the "character" that we created for ourselves. Wake up and find your true self in heaven! I Love You and Peace Be With You!