Robert Fludd
As above, so below

Fludd was striving for an universal science, combining mysticism, aesthetics and the more rational sciences to an all-embracing system of knowledge.

Osho on Yoga
The Alpha and the Omega

Osho’s discourses on the Yoga Sutras of Patanjali, given in Pune from 1973-76.

Arthur Schopenhauer
On Death and Life as Dying

For any culture which is primarily concerned with meaning, the study of death – the only certainty that life holds…

Matthew David Segall
Footnotes 2 Plato

My own infrequent writings are purely experientially and I’m not well-read enough to refer to the spiritual heritage of millenia. However others can.