“Granted that any practice causes more pain to animals than it gives pleasure to man; is that practice moral or immoral? And if, exactly in proportion as human beings raise their heads out of the slough of selfishness, they do not with one voice answer 'immoral,' let the morality of the principle of utility be for ever condemned.”

Source: 2010s, The Moral Landscape (2010), p. 3

The Pragmatics of Patriotism (1973)
Context: Selfishness is the bedrock on which all moral behavior starts and it can be immoral only when it conflicts with a higher moral imperative. An animal so poor in spirit that he won't even fight on his own behalf is already an evolutionary dead end; the best he can do for his breed is to crawl off and die, and not pass on his defective genes.

Pt. VI, ch. III
Jude the Obscure (1895)

Morality
The Note-Books of Samuel Butler (1912), Part II - Elementary Morality

Testaments Betrayed (1995), p. 7
Context: Suspending moral judgment is not the immorality of the novel; it is its morality. The morality that stands against the ineradicable human habit of judging instantly, ceaselessly, and everyone; of judging before, and in the absence of, understanding. From the view­point of the novel’s wisdom, that fervid readiness to judge is the most detestable stupidity, the most pernicious evil.

Source: The Moral Judgment of the Child (1932), Ch. 2 : Adult Constraint and Moral Realism <!-- p. 185 -->
Context: The majority of parents are poor psychologists and give their children the most questionable moral trainings. It is perhaps in this domain that one realized most how keenly how immoral it can be to believe too much in morality, and how much more precious is a little humanity than all the rules in the world. Thus the adult leads the child to the notion of objective responsibility, and consolidates in consequence a tendency that is already natural to the spontaneous mentality of little children.

Source: 1920s, The Future of an Illusion (1927), Ch. 7