The Tree of Life is the Fact that this is GOD'S LIFE, not Ours; Thus, He is Lord of Our Life: the Tree of Life is KEEPING it that way

As former United States President Joseph Biden would say, "Think about it."  When there was nothing--no dimensions, no infinity, no "thing" in any way, shape or form, there was . . . well, we don't know.  There was (...?), the ineffable God.  And (...?) had the power to create "thing" out of nothing.  The No-thing that (...?) Itself was (and is), everything is from It, and everything is OF It.  (...?) has made us to live, and it "gives" us life; but we physically and the life He has given us nevertheless and evermore are HIS.  He owns us.  STAY in that channel with Him as your lord, and everything is all right.

The Tree of Life is submission to "God is in control."