The man has crossed into the split awareness of good and evil, the divided consciousness that names things opposite and so loses the single vision it held before. Now stands a second tree, the tree of life, the inner spinal column and its rising current that carries the power of undying awareness. The hand put forth is the reach of the lower, divided self toward that high tree while still unripe. The barring is not cruelty but timing: the immortal current cannot be seized by a consciousness still caught in the war of opposites, so the way to it is held until the self is ready.
Once a person falls into divided, either-or thinking, the current of undying life within is kept out of reach until that inner division is healed.
The tree of life: the inner spinal column and its rising current, the channel of undying awareness in the body
The hand put forth: the reach of the lower divided self toward the high inner power while still unready
To know good and evil: the split, opposite-naming awareness that has lost its single vision