Tao Te Ching

“The great Mohammedan theologian, Al-Ghazzali, had similarly turned from the consideration of truths about God to the contemplation and direct apprehension of Truth-the-Fact, from the purely intellectual discipline of the philosophers to the moral and spiritual discipline of the Sufis.”

— Aldous Huxley 1894 – 1963 CE
from Perennial Philosophy