His
Epitome of Theosophy article from 1888. See also in his selected writings,
Echoes of the Orient, volume 3:
https://www.theosociety.org/pasadena/wqj-ep/th-wqjep.htm
"Theosophy, the Wisdom-Religion, has existed from immemorial time. It offers us a theory of nature and of life which is founded upon knowledge acquired by the Sages of the past, more especially those of the East; and its higher students claim that this knowledge is not imagined or inferred, but that it is a knowledge of facts seen and known by those who are willing to comply with the conditions requisite for seeing and knowing.
Theosophy, meaning knowledge of or about God (not in the sense of a personal anthropomorphic God, but in that of divine "godly" wisdom), and the term "God" being universally accepted as including the whole of both the known and the unknown, it follows that "Theosophy" must imply wisdom respecting the absolute; and, since the absolute is without beginning and eternal, this wisdom must have existed always. Hence Theosophy is sometimes called the Wisdom-Religion, because from immemorial time it has had knowledge of all the laws governing the spiritual, the moral, and the material.
The theory of nature and of life which it offers is not one that was at first speculatively laid down and then proved by adjusting facts or conclusions to fit it; but is an explanation of existence, cosmic and individual, derived from knowledge reached by those who have acquired the power to see behind the curtain that hides the operations of nature from the ordinary mind. Such Beings are called Sages, using the term in its highest sense. Of late they have been called Mahatmas and Adepts. In ancient times they were known as the Rishis and Maha-rishis — the last being a word that means Great Rishis.
It is not claimed that these exalted beings, or Sages, have existed only in the East. They are known to have lived in all parts of the globe, in obedience to the cyclic laws referred to below. But as far as concerns the present development of the human race on this planet, they now are to be found in the East, although the fact may be that some of them had, in remote times, retreated from even the American shores."