"Every one of these great Sages and Seers, whether he was the Buddha-Gautama of India, or Lao-Tse of China, or Sankaracharya of India again, or Jesus, or Empedocles, or Pythagoras, or Apollonius of Tyana: any one of the numerous host of them all taught the same fundamental doctrines which therefore were identical. (Chapter 3)"
January 1, 1970
https://en.wikiquote.org/wiki/Gottfried_de_Purucker