"The result of this inquiry, which is presented here, is that Arja in part in itself, in part in forms derived from it, is proven to be the ancient, indigenous, honorable designation of the Iranian peoples and lands in its widest extension, as it also [designates] the three higher Indian casts and the Brahmanical constitution and the Sanskrit rhetoric of the Indian lands. It shows us the sense in which we are to differentiate the Aryan Indians from the rest. For the name seems not to apply to other peoples of the Indogerman family.’"
January 1, 1970
https://en.wikiquote.org/wiki/Christian_Lassen