The body is dust and to dust it will return, but the soul of man will never die. Many deny that fact. They believe that dead is dead. Their thoughts rise no higher than the grave. They live to themselves and they will die to themselves.
Then, in that first moment after death, they will realize their soul is alive and they are very conscious of this “after death” existence. They will also realize that they have entered eternity without God. For them, eternal hell has begun.
A decision against God in this life is binding after death. Only, in this life, by your own choice, can a decision against God be reversed.
“For God so loved the world, that He gave His only begotten Son; that whoever believes in Him should not perish, but have everlasting life.” John 3:16