Perennial Philosophy

The "eternal philosophy" is the notion of the universal recurrence of philosophical insight independent of epoch or culture, including universal truths on the nature of reality, humanity or consciousness. The term philosophia perennis was first used in the 16th century by Agostino Steuco, and later taken up by the German mathematician and philosopher Gottfried Leibniz who used it to designate the common, eternal philosophy that underlies all religions, and in particular the mystical streams within them. The term has become popular in more recent times after Aldous Huxley wrote his 1945 book: The Perennial Philosophy.