Kabbalah and Transmigration

In relation to Spinoza (d.1677), his contemporary Leibniz (d.1716) reported the former's belief in “a sort of Pythagorical transmigration” (Klever 1996:47). This report has tended to be ignored, and sometimes dismissed as an exaggeration. Some reflection is perhaps necessary.
The Leibniz reference can invite associations of Neoplatonism, and also Kabbalist gilgul. However, a substantial problem with the latter subject is the wide variation of Kabbalist belief. Gilgul or transmigratio...