The Tree of Life and The Tree of the Knowledge of Good and Evil are both the same tree...IMU.
It is none other than The Word of God. The Law and The Spirit, The Letter which kills and The Spirit which giveth Life.
Deu 30:15 See, I have set before thee this day life and good, and death and evil;
Deu 30:16 In that I command thee this day to love the LORD thy God, to walk in his ways, and to keep his commandments and his statutes and his judgments, that thou mayest live and multiply: and the LORD thy God shall bless thee in the land whither thou goest to possess it.
Pro_3:18 She is a tree of life to them that lay hold upon her: and happy is every one that retaineth her.
Pro_11:30 The fruit of the righteous is a tree of life; and he that winneth souls is wise.
Pro_13:12 Hope deferred maketh the heart sick: but when the desire cometh, it is a tree of life.
Pro_15:4 A wholesome tongue is a tree of life: but perverseness therein is a breach in the spirit.
Rev_2:7 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.
The Word of God/Jesus The Christ
Rom 7:6 But now we are delivered from the law, that being dead wherein we were held; that we should serve in newness of spirit, and not in the oldness of the letter.
Rom 7:7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
Rom 7:8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.
Rom 7:9 For I was alive without the law once: (so was Adam) but when the commandment came, sin revived, and I died. (so did Adam)
Rom 7:10 And the commandment, which was ordained to life, I found to be unto death. (so did Adam)
Rom 7:11 For sin, taking occasion by the commandment, deceived me, and by it slew me. (so did it Adam)
Rom 7:12 Wherefore the law is holy, and the commandment holy, and just, and good.
Rom 7:13 Was then that which is good made death unto me? God forbid. But sin, that it might appear sin, working death in me by that which is good; that sin by the commandment might become exceeding sinful.
Rom 7:14 For we know that the law is spiritual: but I am carnal, sold under sin. (so was Adam)