“I really believe there are some people who hate to contemplate the happiness of others.”

Good heavens! That's not enough!
What's the use of walking with God? Walking with God is no illusion p. 209
Jesus Our Destiny

Oath of Fealty (1982) (co-written with Jerry Pournelle)

Source: Why Not Me?

Source: The Impact of Science on Society

Toda Raba (1934)
Context: We are not simple people who believe in happiness; nor weaklings who crumple to the ground in distress at the first reverse; nor skeptics observing the bloody effort of marching humanity from the lofty heights of a mocking, sterile wit. Believing in the fight, though we entertain no illusions about it, we are armed against every disappointment.

Source: The enjoyments of life (such was now my theory) are sufficient to make it a pleasant thing, when they are taken en passant, without being made a principal object. Once make them so, and they are immediately felt to be insufficient. They will not bear a scrutinizing examination. Ask yourself whether you are happy, and you cease to be so. The only chance is to treat, not happiness, but some end external to it, as the purpose of life. Let your self-consciousness, your scrutiny, your self-interrogation, exhaust themselves on that; and if otherwise fortunately circumstanced you will inhale happiness with the air you breathe, without dwelling on it or thinking about it, without either forestalling it in imagination, or putting it to flight by fatal questioning. This theory now became the basis of my philosophy of life. And I still hold to it as the best theory for all those who have but a moderate degree of sensibility and of capacity for enjoyment; that is, for the great majority of mankind."

Autobiography, Ch 5, https://www.gutenberg.org/files/10378/10378-h/10378-h.htm#link2H_NOTE https://www.laits.utexas.edu/poltheory/mill/auto/auto.c05.html source: Autobiography (1873), Ch. 5: A Crisis in My Mental History (p. 100)

Guardian columns

Context: The only people I really hate are servants. They are not really human beings at all. As attributed without citation in At Home by Bill Bryson, Chapter V, "The Scullery and the Larder" p. 111