"The priority of India is clearer in philosophy than in medicine, though here too origins are veiled, and every conclusion is an hypothesis. Some Upanishads are older than any extant form of Greek philosophy, and Pythagoras, Parmenides and Plato seem to have been influenced by Indian metaphysics; but the speculations of Thales, Anaximander, Anaximenes, Heraclitus, Anaxagoras and Empedocles not only antedate the secular philosophy of the Hindus, but bear a sceptical and physical stamp suggesting any other origin than India. Victor Cousin believed that “we are constrained to see in this cradle of the human race the native land of the highest philosophy.” It is more probable that no one of the civilizations known to us was the originator of any of the elements of civilization."