F.J. Sheed wrote, Our soul has the supernatural power to act towards God, but it has a natural habit of acting for self, ignoring God.
He goes on to point out the supernatural refers to making that which we can't see as the goal, but we're distracted by the natural, the attractions of the visible. This is the struggle.
Serious sin and our choice of self stops the supernatural grace that flows through us from God. We lose, so supernaturally we become dead.
Sheed follows this with the thought we may still have faith and hope, but each is no longer life giving without love. Love is what nourishes the soul's life and habits. That is why of the three love is the greatest!