Since time immemorial, one perennial Wisdom permeates the whole history of mankind, expressing itself in the spiritual traditions of all peoples. Even though these traditions often differ in their forms of expression in different places and times, they nevertheless fully coincide in their essential contents. A.K. Coomaraswamy once said: “The time is coming when a Summa of the Philosophia Perennis will have to be written, impartially based on all orthodox sources whatever”. Whitall N. Perry, after fifteen years of patient work, completed this impressive anthology containing several thousands of quotations gathered from a wide range of spiritual authorites, pointing to this One transcendent Truth which manifests through many languages. “The nearest thing to a whole religious library compressed between the covers of a single book.”