“If there were one word that could act as a standard of conduct for one's entire life, perhaps it would be 'thoughtfulness.”

Life & Times of Michael K (1983)
Context: I could live here forever, he thought, or till I die. Nothing would happen, every day would be the same as the day before, there would be nothing to say. The anxiety that belonged to the time on the road began to leave him. Sometimes, as he walked, he did not know whether he was awake or asleep. He could understand that people should have retreated here and fenced themselves in with miles and miles of silence; he could understand that they should have wanted to bequeath the privilege of so much silence to their children and grandchildren in perpetuity (though by what right he was not sure); he wondered whether there were not forgotten corners and angles and corridors between the fences, land that belonged to no one yet. Perhaps if one flew high enough, he thought, one would be able to see.

America Challenged (1960)
Other speeches and writings

The Devil's Dictionary (1911)

Vorkosigan Saga, Barrayar (1991)

Page 283
The Best of Myles (1968)

Source: Drenai series, Legend, Pt 1: Against the Horde, Ch. 28
Context: It would be a fine thing if war could be conducted as a game where no lives were lost. At the end of a battle combatants could meet [... ] and drink and talk.

Source: Something More, A Consideration of the Vast, Undeveloped Resources of Life (1920), p. 84-85
Context: It is significant that the Great Teacher does not draw up a code of laws or list or sins. Nowhere does Jesus say explicitly that human slavery is a sin, or that the employment of little children for fourteen hours a day in a factory is a sin. He deals in general principles concerning the great fundamentals of life. So clear is his teaching, however, that there can be no doubt as to what he thinks of human slavery or the oppression of little children. In the teaching of Jesus, life is relationship, dwelling on friendly and affectionate terms with God, with ourselves, and with our fellowmen. Anything which destroys this relationship is sin. By this standard any thought or act may safely be judged.

The Tragic Sense of Life (1913), II : The Starting-Point
Context: The truth is sum, ergo cogito — I am, therefore I think, although not everything that is thinks. Is not consciousness of thinking above all consciousness of being? Is pure thought possible, without consciousness of self, without personality? Can there exist pure knowledge without feeling, without that species of materiality which feelings lends to it? Do we not perhaps feel thought, and do we not feel ourselves in the act of knowing and willing? Could not the man in the stove [Descartes] have said: "I feel, therefore I am"? or "I will, therefore I am"? And to feel oneself, is it not perhaps to feel oneself imperishable?