“Whether or no it be for the general good, life is robbery. It is at this point that with life morals become acute. The robber requires justification.”

Source: The Sacred Depths of Nature (1998), p. 49
Context: The biochemistry and biophysics are the notes required for life; they conspire, collectively, to generate the real unit of life, the organism. The intermediate level, the chords and tempos, has to do with how the biochemistry and biophysics are organized, arranged, played out in space and time to produce a creature who grows and divides and is.

Introductory
A Treatise on Man and the Development of His Faculties (1842)

Marcus Aurelius: The Meditations (p. 82)
Classics Revisited (1968)

Source: A Theology of Liberation - 15th Anniversary Edition, Chapter Six, The Process Of Liberation In Latin America, p. 53

The Bell (1958), ch. 9; 2001, p. 119.

Autobiography (1936; 1949; 1958)
Context: To be in good moral condition requires at least as much training as to be in good physical condition. But that certainly does not mean asceticism or self-mortification. Nor do I appreciate in the least the idealization of the "simple peasant life." I have almost a horror of it, and instead of submitting to it myself I want to drag out even the peasantry from it, not to urbanization, but to the spread of urban cultural facilities to rural areas.

On the Heights of Despair (1934)

Bunmeiron no Gairyaku [An Outline of a Theory of Civilization] (1875).
Context: Robbery and murder are the worst of human crimes; but in the West there are robbers and murderers. There are those who form cliques to vie for the reins of power and who, when deprived of that power, decry the injustice of it all. Even worse, international diplomacy is really based on the art of deception. Surveying the situation as a whole, all we can say is that there is a general prevalence of good over bad, but we can hardly call the situation perfect. When, several thousand years hence, the levels of knowledge and virtue of the peoples of the world will have made great progress (to the point of becoming utopian), the present condition of the nations of the West will surely seem a pitifully primitive stage. Seen in this light, civilization is an open-ended process. We cannot be satisfied with the present level of attainment of the West.