"In all nations there are minds which incline to dwell in the conception of the fundamental Unity. The raptures of prayer and ecstasy of devotion lose all being in one Being. This tendency finds its highest expression in the religious writings of the East, and chiefly in the Indian Scriptures, in the Vedas, the Bhagavat Geeta and the Vishnu Purana. These writings contain little else than this idea, and they rise to pure and sublime strains in celebrating it."(Essays, X, p. 120)
More impressions here. Reading the book: Vedic Religion and Philosophy by Swami Prabhavananda. The above quote was written on the book, possibly by the person who donated it to the library of Colorado College.
PS: As it is that time of the year, I have again ordered the book The Sermon on the Mount according to Vedanta by Swami Prabhavananda from library. Will post on the same.