I would like you to talk me through the idea that Adam is billions of years old, and use Genesis as your proof. Do it slowly, line by line. Thank you. I feel like I need to understand your theology.
Sure, but remember that Adam was made in the likeness of Jesus, with a Shekinah Glory or Brightness, in a perfect body and meant to live forever. In Heaven, all Christians will be in our perfect bodies which never die and our bodies will be like Adam's was before the fall.
Adam lived inside the first firmament, which God called Heaven, which was made on the
SECOND Day. Gen 1:6-8 Adam's firmament protected his Earth from the water into which the firmament was placed. This shows that the interior of the firmament was totally self sufficient so long as the walls of the firmament protected Adam's Earth from the water which totally surrounded it. Adam's Heaven was also transportable.
On the
THIRD Day, Gen 2:4, the Lord God made other Heavens (
plural), or other firmaments or boundaries of Universes. Our Cosmos began some 13.8 Billion years ago, in man's time and Adam was living with the Lord at that time, on the first Earth. Adam lived until the present
6th Day or until some 12k years ago when he passed from his Earth into God's Eternity. It had been 930 years Gen 5:5 since he and Eve were born again in Christ Spiritually Gen 5:1-2 or "created" in God's Image by the Trinity. (God)
Adam had been alive for some 10 Billions of years before the last universal common ancestor appeared in the water of our Planet some 3.8 Billion years ago, in man's time. Gen 1:21 God is
NOT subject to man's time since He is physically in the 3rd Heaven and today is the Day of Salvation, the present 6th Day/Age in the Creation of the perfect 3rd Heaven. God Bless you