“In the mystic traditions of the different religions we have a remarkable unity of spirit. Whatever religion they may profess, they are spiritual kinsmen. While the different religions in their historic forms bind us to limited groups and militate against the development of loyalty to the world community, the mystics have already stood for the fellowship of humanity in harmony with the spirit of the mystics of ages gone by.”

Words of Sarvepalli Radhakrishnan, quoted by Haile Selassie in an address http://www.jah-rastafari.com/selassie-words/show-jah-word.asp?word_id=radhakrishan during the Indian President's state visit to Ethiopia (13 October 1965), quoted in Foreign Affairs Record Vol. 11-12 (1965-1966) by India Ministry of External Affairs, p. 266; Radhakrishnan is also quoted as having made these remarks in The Visva-Bharati Quarterly Vol. 5 (1939-1940)
Misattributed
Context: In the mystic traditions of the different religions we have a remarkable unity of spirit. Whatever religion they may profess, they are spiritual kinsmen. While the different religions in their historic forms bind us to limited groups and militate against the development of loyalty to the world community, the mystics have already stood for the fellowship of humanity in harmony with the spirit of the mystics of ages gone by.

Source: The Two Sources of Morality and Religion (1932), Chapter III : Dynamic Religion
Context: Religion is to mysticism what popularization is to science. What the mystic finds waiting for him, then, is a humanity which has been prepared to listen to his message by other mystics invisible and present in the religion which is actually taught. Indeed his mysticism itself is imbued with this religion, for such was its starting point. His theology will generally conform to that of the theologians. His intelligence and his imagination will use the teachings of the theologians to express in words what he experiences, and in material images what he sees spiritually. And this he can do easily, since theology has tapped that very current whose source is the mystical. Thus his mysticism is served by religion, against the day when religion becomes enriched by his mysticism. This explains the primary mission which he feels to be entrusted to him, that of an intensifier of religious faith.

Autobiography (1936; 1949; 1958)
Context: Religion merges into mysticism and metaphysics and philosophy. There have been great mystics, attractive figures, who cannot easily be disposed of as self-deluded fools. Yet, mysticism (in the narrow sense of the word) irritates me; it appears to be vague and soft and flabby, not a rigorous discipline of the mind but a surrender of mental faculties and living in a sea of emotional experience. The experience may lead occasionally to some insight into inner and less obvious processes, but it is also likely to lead to self-delusion. <!-- p. 14 (1946)

p. 25.

2010s, 2013, Interview in La Repubblica

As quoted in The Private Albert Einstein (1992) by Peter A. Bucky and Allen G. Weakland, p. 86
Attributed in posthumous publications

Notes from Devotional Authors of the Middle Ages (1873-1874)
Context: That Religion is not devotion, but work and suffering for the love of God; this is the true doctrine of Mystics — as is more particularly set forth in a definition of the 16th century: "True religion is to have no other will but God's." Compare this with the definition of Religion in Johnson's Dictionary: "Virtue founded upon reverence of God and expectation of future rewards and punishments"; in other words on respect and self-interest, not love. Imagine the religion which inspired the life of Christ "founded" on the motives given by Dr. Johnson!
Christ Himself was the first true Mystic. "My meat is to do the will of Him that sent me and to finish His work." What is this but putting in fervent and the most striking words the foundation of all real Mystical Religion? — which is that for all our actions, all our words, all our thoughts, the food upon which they are to live and have their being is to be the indwelling presence of God, the union with God; that is, with the Spirit of Goodness and Wisdom.