2:7 `He who has an ear, let him hear what the Spirit says to the churches. To him who overcomes, I will grant to eat of the tree of life, which is in the Paradise of God.'
He who has an ear, let him hear what the SPIRIT says to the CHURCHES.
Besides REMEMBER, REPENT, and DO (Revelation 2:5), the people in the church at Ephesus are asked to HEAR. However, this time rather than it being Christ talking (Revelation 2:1), it is the SPIRIT talking to ALL the churches. BUT you must hear first.
To him who overcomes,
We, humans, continually fight a spiritual battle to overcome principalities, seen powers, and unseen powers. For the "overcomer", there is comfort to know Christ has already been there and done that. Christ is not the enemy; He only causes "good things" for the "overcomer". This is described in Romans 8:28, Ephesians 1:18-23, and Colossians 1:15-18.
I will grant to eat of the TREE OF LIFE which is in the PARADISE OF GOD.
The TREE OF LIFE is first mentioned in Genesis 2:9 and it gives everlasting life. When sin entered this world, we humans were banned from getting to the TREE OF LIFE in Genesis 3:22-23. However, here the TREE OF LIFE is promised to 'overcomers'.
Even at the end, this TREE OF LIFE is shown as straddling the river of life flowing from the throne (Revelation 22:2). Lastly, anyone who takes away from the words of this Revelation prophesy will have their part in the TREE OF LIFE removed (Revelation 22:18-19).
PARADISE
In Jewish apocalyptic works, it is mentioned that the glorious new age of the Messiah will have Eden restored to its former beauty and lusciousness (including the TREE OF LIFE). Isaiah 51:2-3 sounds alot like the new Jerusalem of Revelation. Everyone knows that it is the Lord who made the desolate wilderness like Eden again as described in Ezekiel 36:33-36. In fact, before the fall of man into the sinful state, we all, in a sense were in this Eden (Ezekiel 28:11-19). The TREE OF LIFE is symbolically the source of our eternal life. This place of fellowship and sustenance for the 'overcomer' is no longer forbidden or hidden.