“I affirm, and would maintain, that true religion consists in proposing, as our great end, a growing likeness to the Supreme Being. Its noblest influence consists in making us more and more partakers of the Divinity.”
"Likeness to God", an address in Providence, Rhode Island (1828) http://www.americanunitarian.org/likeness.htm
Context: I affirm, and would maintain, that true religion consists in proposing, as our great end, a growing likeness to the Supreme Being. Its noblest influence consists in making us more and more partakers of the Divinity. For this it is to be preached. Religious instruction should aim chiefly to turn men's aspirations and efforts to that perfection of the soul, which constitutes it a bright image of God. Such is the topic now to be discussed; and I implore Him, whose glory I seek, to aid me in unfolding and enforcing it with simplicity and clearness, with a calm and pure zeal, and with unfeigned charity.
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William Ellery Channing 71
United States Unitarian clergyman 1780–1842Related quotes
“True influence consists in surpassing one's model not in reproducing it.”
L'Influence du symbolism francais sur la poesie Americaine(de 1910 a 1920), Champion, Paris 1929 trans William Pratt and Anne Rich AMS , New York 1985 ISBN 9780404615796

16
Les Caractères (1688), De la société et de la conversation
Context: The true spirit of conversation consists more in bringing out the cleverness of others than in showing a great deal of it yourself; he who goes away pleased with himself and his own wit is also greatly pleased with you. Most men would rather please than admire you; they seek less to be instructed, and even to be amused, than to be praised and applauded.

“This divine madness enters more or less into all our noblest undertakings.”
Here Longfellow is translating or paraphrasing an expression attributed to a canon of Seville, also quoted as "we shall have a church so great and of such a kind that those who see it built will think we were mad".
Table-Talk (1857)
Context: "Let us build such a church, that those who come after us shall take us for madmen," said the old canon of Seville, when the great cathedral was planned. Perhaps through every mind passes some such thought, when it first entertains the design of a great and seemingly impossible action, the end of which it dimly foresees. This divine madness enters more or less into all our noblest undertakings.

“True eloquence consists in saying all that need be said and no more.”
La véritable éloquence consiste à dire tout ce qu’il faut, et à ne dire que ce qu’il faut.
Maxim 250.
Reflections; or Sentences and Moral Maxims (1665–1678)

“I like Islam, it is a consistent idea of religion and open-minded.”
As quoted in A Logical Journey: From Gödel to Philosophy (1996) by Hao Wang

Zeno, 53.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 7: The Stoics

"Modern Ethics", pp. 268–269
The Universal Kinship (1906), The Ethical Kinship