The fruit of the knowledge of good and evil uplifts the human soul and suppresses the spirit.
By eating this fruit man’s soul life will be so stimulated that his spirit life will be stifled.
This means man will lose the True Knowledge of God and thus be dead to Him.
The knowledge of good and evil in this world is itself evil.
Such knowledge springs from the intellect of man’s soul.
It puffs up the soul life and consequently deflates the spirit life to the point of losing any knowledge of God, to the point of becoming as much as dead.