I mentioned symbolism of "suspension", aka crucifixion. Note Philo's metaphoric/symbolic language associated with the practice.
......for it follows of necessity, that the body must be thought akin to the souls that love the body, and that external good things must be exceedingly admired by them, and all the souls which have this kind of disposition depend on dead things, and, like persons who are crucified, are attached to corruptible matter till the day of their death. (62) But the soul that is united to virtue has for its inhabitants those persons who are preeminent for virtue, persons whom the double cavern has received in pairs, Abraham and Sarah, Isaac and Rebeckah, Leah and Jacob, virtues and those who possess them; Chebron itself keeping the treasure-house of the memorials of knowledge and wisdom, which is more ancient than Janis and the whole land of Egypt, for nature has made the soul more ancient than the body, that is than Egypt, and virtue more ancient than vice, that is than Janis (and the name Janis, being interpreted, means the command of answer), estimating seniority rather by dignity than by length of time.
Crucifixion had taken on a moral/philosophical meaning beyond the obvious OT connotation of humiliation and curse.
Early Gnostic Christians retained a similar view. Some allegorized the Logos/primal man descending to a lower state as a crucifixion.
These early theologies are easiest explained as a continuum of earlier Jewish thought.