Since mortal sin belittles God’s infinite worth and value then committing a mortal sin has the consequences of paying an infinite price. This is why Christ could atone for the sins of His people because He is infinite in value. He payed the infinite price. The old identity (self) is tormented forever and ever in hell while the new self (spirit) is reborn. The Greek word for soul in the New Testament is psyche. The Bible defines it as the mind, will, and emotions (self). The Bible also tells us that as a baby up to and through the time He was a man Jesus had to learn and grow. He didn’t know everything as a man. He had a finite and limited mind. This was His human soul. This is the soul that would die and be tormented forever as Jesus was nailed to the cross and descended into hell. The Bible is pretty clear that Jesus died for sinners. As God, Jesus didn’t have to learn and grow. He was infinite in wisdom and knowledge. This is His Divine Spirit. This is what entered His new body when He was resurrected. On the cross He said to the Father, “Into Your hands I commit my spirit.” The human soul is tormented forever. The Divine Spirit lives forever in God’s glory. Man is body soul and spirit. Soulish (natural) is the Biblical Greek psyche. A natural body is transformed into a spiritual one. Our true inner self is the spirit. We put to death the soulish or natural man (false self) and walk in the spirit (True Self). The psyche (natural man) is tormented forever in hell - The soulish (soul body). The spiritual goes to be with the Father. As Robin Parry says in "The Evangelical Universalist:
One could maintain that the devil will be punished forever, but that Lucifer will ultimately be saved. Paul is able to speak of how God saves humans through the putting to death of “the flesh” or the “old person”. The human in rebellion against God is “killed” so that there is a new creation (2 Cor 5:17). According to the tradition, the devil is a fallen angel. The devil, like the “flesh”, must be destroyed forever, because creation has no place for him. But he dies, and Lucifer is reborn as a redeemed angel. It would still be possible to speak of the devil being tormented forever and ever to symbolize this defeat even though no actual being is still in the lake of fire. This goes beyond anything taught in Revelation, but it is one way of trying to reconcile what revelation teaches with what Colossians teaches and I tentatively commend it to the reader. The Evangelical Universalist page 131