“In a way, old age, when the body becomes less dominant, is, for many of us, a preparation for the dissociation of body and soul.
Therefore, for some people, old age may be a time of great tranquility and serenity, as the body and its wishes and desires become weaker, and the soul can shine undisturbed.
For others, whose conscious mind was always, and wholly, defined by their body, it is a period full of anguish, since their desires remain with them, although they can no longer be satisfied.
Teleologically speaking, however, old age eases the final blow of death.”
–Rabbi Adin Steinsaltz
From Simple Words by Rabbi Adin Steinsaltz