Thomas Jefferson acquired a unique perspective on old age.
Jefferson thought everything had a purpose. For most of his life he was frustrated over an inability to determine a purpose for old age. When he got older he found a satisfying answer. Jefferson concluded the purpose of old age is to prepare humans for death. Apparently when the time came, he was ready.
I think there’s something to Jefferson’s take.
So many waste years of life and happiness because of fearing death. Little do they know that one day they’ll be ready. Or, at least that is often the case demonstrated by older ones like Jefferson.