“Particulars are frequently fallible, but universals never. Occult philosophy lays bare Nature in her complete nakedness, and alone contemplates the wisdom of universals by the eyes of intelligence. Accustomed to partake of the rivers which flow from the Fountain of Life, it is unacquainted with grossness and with clouded waters.”

Source: Liber Null & Psychonaut (1987), p. 151
Context: Physical processes alone will never completely explain the existence of the universe, life, and consciousness. Religious answers are just wishful thinking and wanton fabrication cast over a bottomless pit of ignorance. To explain their occult and mystical experiences, magicians are forced to develop models beyond the scope of materialistic or religious systems.

"On the Harmony of Theory and Practice in Mechanics" (Jan. 3, 1856)
Context: The objects of instruction in purely scientific mechanics and physics are, first, to produce in the student that improvement of the understanding which results from the cultivation of natural knowledge, and that elevation of mind which flows from the contemplation of the order of the universe; and secondly, if possible, to qualify him to become a scientific discoverer.<!--p. 176

The Notebooks of Leonardo da Vinci (1883), III Six books on Light and Shade
Context: Shadow partakes of the nature of universal matter. All such matters are more powerful in their beginning and grow weaker towards the end, I say at the beginning, whatever their form or condition may be and whether visible or invisible. And it is not from small beginnings that they grow to a great size in time; as it might be a great oak which has a feeble beginning from a small acorn. Yet I may say that the oak is most powerful at its beginning, that is where it springs from the earth, which is where it is largest.

Online interview http://www.zen-deshimaru.com/EN/sangha/deshimaru/q-r/0101.htm
Context: Religions remain what they are. Zen is meditation. Meditation is the foundation of every religion. People today feel an intense need to go back to the source of religious life, to the pure essence in the depths of themselves which they can discover only through actually experiencing it. They also need to be able to concentrate their minds in order to find the highest wisdom and freedom, which is spiritual in nature, in their efforts to deal with the influences of every description imposed upon them by their environment. Human wisdom alone is not enough, it is not complete. Only universal truth can provide the highest wisdom. Take away the word Zen and put Truth or Order of the Universe in its place.

Source: Medea (431 BC), Line 409

As quoted in Introduction to Philosophy (1935) by George Thomas White Patrick and Frank Miller Chapman, p. 44
Variant translations:
I am satisfied with the mystery of life's eternity and with a knowledge, a sense, of the marvelous structure of existence — as well as the humble attempt to understand even a tiny portion of the Reason that manifests itself in nature.
Enough for me the mystery of the eternity of life, and the inkling of the marvellous structure of reality, together with the single-hearted endeavor to comprehend a portion, be it never so tiny, of the reason that manifests itself in nature.
1930s, Mein Weltbild (My World-view) (1931)

Divine Healing of the Body (1979), p. 287.

Source: A Voice from the South by a Black Woman of the South (1892), p. 14

"A Dissertation on the Doctrine of Ideas, &c."
The Philosophical and Mathematical Commentaries of Proclus on the First Book of Euclid's Elements Vol. 1 (1788)