A more common explanation for the feeling of being Old in Soul is tied up in Buddhist and Hindu ideas of reincarnation, or metempsychosis. Interestingly, this is most likely where the origin of the phrase “Old Soul” came from in the first place.
Aletheia Luna, Old Souls: The Sages and Mystics of Our World
buddhism, hinduism, metempsychosis, old-soul, old-souls, reincarnation