These alchemical principles you mention are probably derived from the Neoplatonic philosophy of Plotinus and Proclus, which is a pretty fascinating school of me

These alchemical principles you mention are probably derived from the Neoplatonic philosophy of Plotinus and Proclus, which is a pretty fascinating school of metaphysics with a significant mystical component. These Platonic influences are highly visible in Catholic and Orthodox churches today, having been transmitted through Augustine, Pseudo-Dionysius, and Origen. Hundreds of years ago, it made perfect sense for one person to be both a scientist and a theologian. Also, "The Secret Teachings Of All Ages" sounds quite similar to the perennial philosophy.