Spirit Doesn't Change After Death

"When a person who has always been good and faithful to his God lays down his body in the dust, his spirit will remain the same in the spirit world. It is not the body that has control over the spirit, but it is the spirit that controls the body. When the spirit leaves the body, the body because lifeless. The spirit has not changed one single particle of itself by leaving the body." - Heber C. Kimball