“He that is willing to tolerate any religion, or discrepant way of religion, besides his own, unless it be in matters merely indifferent, either doubts of his own, or is not sincere in it.”

http://mediamatters.org/items/200512010018

Wer Wissenschaft und Kunst besitzt, / Hat auch Religion / Wer jene beiden nicht besitzt / Der habe Religion
As quoted in Jost Lemmerich's "Science and Conscience: The Life of James Franck" (2011), p. 261.
Variant translation: "The man who science has and art, He also has religion. But he who is devoid of both, He surely needs religion." (as quoted in "Homilies of science" by Paul Carus (1892) and The Open Court, Weekly Journal, Vol. II (1887).
Wilhelm Meister's Lehrjahre (Apprenticeship) (1786–1830)

Source: Initiation Into Hermetics (1956), p. 26

Edicts of Ashoka (c. 257 BC)
Context: Beloved-of-the-Gods, King Piyadasi, honors both ascetics and the householders of all religions, and he honors them with gifts and honors of various kinds. But Beloved-of-the-Gods, King Piyadasi, does not value gifts and honors as much as he values this — that there should be growth in the essentials of all religions. Growth in essentials can be done in different ways, but all of them have as their root restraint in speech, that is, not praising one's own religion, or condemning the religion of others without good cause. And if there is cause for criticism, it should be done in a mild way. But it is better to honor other religions for this reason. By so doing, one's own religion benefits, and so do other religions, while doing otherwise harms one's own religion and the religions of others. Whoever praises his own religion, due to excessive devotion, and condemns others with the thought "Let me glorify my own religion," only harms his own religion. Therefore contact (between religions) is good. One should listen to and respect the doctrines professed by others. Beloved-of-the-Gods, King Piyadasi, desires that all should be well-learned in the good doctrines of other religions.

Address at the Rameswaram Temple on Real Worship
Context: It is in love that religion exists and not in ceremony, in the pure and sincere love in the heart. Unless a man is pure in body and mind, his coming into a temple and worshipping Shiva is useless. The prayers of those that are pure in mind and body will be answered by Shiva, and those that are impure and yet try to teach religion to others will fail in the end. External worship is only a symbol of internal worship; but internal worship and purity are the real things. Without them, external worship would be of no avail. Therefore you must all try to remember this.
People have become so degraded in this Kali Yuga that they think they can do anything, and then they can go to a holy place, and their sins will be forgiven. If a man goes with an impure mind into a temple, he adds to the sins that he had already, and goes home a worse man than when he left it.

Section 9
The True Believer (1951), Part One: The Appeal of Mass Movements

Source: Christianity and the Social Crisis (1907), Ch.1 The Historical Roots of Christianity the Hebrew Prophets, p. 3
Context: To the ceremonial aspects of Jewish religion Jesus was either indifferent or hostile; the thought of the prophets was the spiritual food that he assimilated in his own process of growth. With them he linked his points of view, the convictions which he regarded as axiomatic.... The real meaning of his life and the real direction of his purposes can be understood only in that historical connection.

Pt. II, l. 104.
The True-Born Englishman http://www.luminarium.org/editions/trueborn.htm (1701)