Before Adam and Eve ate from the tree of the knowledge of good and evil, they could not sin. To sin is to "know to do good and to do it not". Sin is not doing wrong, rather it is not doing right and we cannot do what is right if we dont know what is right...in other words, you can only sin if you know its a sin.
So God wants us to quit eating from the wrong tree, spiritually. He wants us to eat from the tree of Life, which spiritually is Christ (eat my flesh, drink my blood). He wants us to know Him, not what is good or evil in man's eyes.
Death can only exist where sin exists. When we partake of (eat of) holiness and righteousness, instead of sin, when we pursue knowing Him instead of what is good or evil, we will live forever and not die. Only our outer shell, our bodies will die but like a seed, they will be transformed into something eternally glorious......hallelujah!