Death and Sin

Rabbeinu Bachya (Devarim 34:5) Many people ask the question how it was possible that someone of the stature of Moses who became the instrument of giving the Torah to the people of Israel, died, whereas Elijah and Chanoch, both people of lesser stature, did not die? The answer is that Moses sinned at the waters of strife whereas both Chanoch and Elijah had not been guilty of sin at all. Seeing that they did not sin, they never became part of the decree of death that Adam was subjected to, and could therefore enjoy eternal life.