Death is not the end of the deep root of life which root of life is one's spirit. Actually the spirit of a person is the real life of that person. The physical body is a body house abode for the spirit of a person.
It is written: "For we know that if our earthly house of this tabernacle were dissolved, we have a building of God, an house not made with hands, eternal in the heavens," (2 Corinthians 5:1 KJV).
It is further written: "There is a natural body, there is a spiritual body", (1 Corinthians 15:44 KJV).
So then the natural body soul is one thing and the spiritual body Soul is another thing. This difference is accentuated in the scripture: "the spirit of man goes upward, and the spirit of the beast goes downward to the earth", (Ecclesiastes 3:21 KJV).