Does the tree of life still exist today?
The tree of life first shows up in the garden of Eden in Genesis 2:9:
>And out of the ground Jehovah God caused to grow every tree that is pleasant to the sight and good for food, as well as the tree of life in the middle of the garden and the tree of the knowledge of good and evil.
Adam and Eve then proceed to NOT eat the tree of life; instead they eat of the tree of knowledge of good and evil and get booted from the garden of Eden. The way to the tree of life was consequently closed, as seen in Genesis 3:24:
>So He drove the man out, and at the east of the garden of Eden He placed the cherubim and a flaming sword which turned in every direction to guard the way to the tree of life.
After that, there's no direct mention of this tree of life until you get to the last book of the Bible, in Revelation 2:7; 22:2, 14, and 19. Revelation 2:7 says,
>He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, to him I will give to eat of the tree of life, which is in the Paradise of God.
What happened after the fall of Adam and Eve and how do we get back to the tree of life? A few footnotes from the Recovery Version are so helpful in understanding what the tree of life is and what God's intention for us is:
>[God] place[d] the created man in front of the tree of life, which signifies the Triune God embodied in Christ as life to man in the form of food. God’s placing man in front of the tree of life indicates that God wanted man to receive Him as man’s life by eating Him organically and assimilating Him metabolically, that God might become the very constituent of man’s being. According to John 1:1, 4, life is in the Word, who is God Himself. This life—the divine, eternal, uncreated life of God—is Christ (John 11:25; 14:6; Col. 3:4a), who is the embodiment of God (Col. 2:9). The tree of life grows along the two sides of the river of water of life (Rev. 22:1-2), indicating that it is a vine. Since Christ is a vine tree (John 15:1) and is also life, He is the tree of life. He was processed through incarnation, crucifixion, and resurrection that man might have life and live by eating Him (John 10:10b; 6:51, 57, 63). (Footnote 2 of Genesis 2:9)
>God’s original intention was that man should eat of the tree of life (Gen. 2:9, 16). Because of the fall, the way to the tree of life was closed to man (Gen. 3:22-24). Through the redemption of Christ, the way by which man could touch the tree of life, which is God Himself in Christ as life to man, was opened again (Heb. 10:19-20). (Footnote 6 of Revelation 2:7)
Christ is life, Christ is the tree, Christ is food—Christ is the tree of life for us to eat, partake of, and enjoy today! The way is opened for us to once again come forward to eat of Him! In eternity, God's redeemed and regenerated ones will enjoy Him as the tree of life as our eternal portion (Rev. 22:2).