Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life.
He that hath an ear, let him hear what the Spirit saith unto the churches; To him that overcometh will I give to eat of the tree of life, which is in the midst of the paradise of God.
In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
Blessed are they that do his commandments, that they may have right to the tree of life, and may enter through the gates into the city.
Genesis 2:9, 3:22
Revelation 2:7, 22:2, 22:14
Jesus Christ is the Tree of Life and was forbidden to be taken part of in the garden after the fall of Adam and Eve. He was to be preserved for the redemption of our sins at a future date. He remains in heaven with the Father, until the hour is come for his return, giving every man a chance to lay claim to him for salvation before it’s too late. That is why God is long suffering.