“Good temper is one of the great preservers of the features.”
This is from Hazlitt's "Conversations of James Northcote, Esq., R.A.," New Monthly Magazine (1826-1827), published in book form in 1830; but the words were spoken by Northcote
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William Hazlitt 186
English writer 1778–1830Related quotes
“A bad-tempered man will never make a good-tempered horse.”
Black Beauty (1877), Ch. VII, p. 36

“Good temper is an estate for life…”
" On Personal Character http://www.blupete.com/Literature/Essays/Hazlitt/PersCharacter.htm" (1821)
The Plain Speaker (1826)
Majlisi, Bihārul Anwār, vol. 71, p. 396

The Evolution of the Physicist's Picture of Nature (1963)
Context: It seems to be one of the fundamental features of nature that fundamental physical laws are described in terms of a mathematical theory of great beauty and power, needing quite a high standard of mathematics for one to understand it. You may wonder: Why is nature constructed along these lines? One can only answer that our present knowledge seems to show that nature is so constructed. We simply have to accept it. One could perhaps describe the situation by saying that God is a mathematician of a very high order, and He used very advanced mathematics in constructing the universe. Our feeble attempts at mathematics enable us to understand a bit of the universe, and as we proceed to develop higher and higher mathematics we can hope to understand the universe better.

Article 15
Virginia Declaration of Rights (1776)