“In civil war it is not given to every man to know how to conduct himself. There is something more than military prudence necessary; there is need of sagacity and the knowledge of men.”

Source: What Men Live By (1881), Ch. XII
Context: And the angel's body was bared, and he was clothed in light so that eye could not look on him; and his voice grew louder, as though it came not from him but from heaven above. And the angel said:
I have learnt that all men live not by care for themselves, but by love.
It was not given to the mother to know what her children needed for their life. Nor was it given to the rich man to know what he himself needed. Nor is it given to any man to know whether, when evening comes, he will need boots for his body or slippers for his corpse.
I remained alive when I was a man, not by care of myself, but because love was present in a passer-by, and because he and his wife pitied and loved me. The orphans remained alive, not because of their mother's care, but because there was love in the heart of a woman a stranger to them, who pitied and loved them. And all men live not by the thought they spend on their own welfare, but because love exists in man.
I knew before that God gave life to men and desires that they should live; now I understood more than that.
I understood that God does not wish men to live apart, and therefore he does not reveal to them what each one needs for himself; but he wishes them to live united, and therefore reveals to each of them what is necessary for all.
I have now understood that though it seems to men that they live by care for themselves, in truth it is love alone by which they live. He who has love, is in God, and God is in him, for God is love.

Source: (1776), Book IV, Chapter II, p. 490.

Freeman (1948), p. 162
Variant: The needy animal knows how much it needs, but the needy man does not.

The Histories
Context: Had previous chroniclers neglected to speak in praise of History in general, it might perhaps have been necessary for me to recommend everyone to choose for study and welcome such treatises as the present, since men have no more ready corrective of conduct than knowledge of the past. But all historians, one may say without exception, and in no half-hearted manner, but making this the beginning and end of their labour, have impressed on us that the soundest education and training for a life of active politics is the study of History, and that surest and indeed the only method of learning how to bear bravely the vicissitudes of fortune, is to recall the calamities of others. Evidently therefore no one, and least of all myself, would think it his duty at this day to repeat what has been so well and so often said. For the very element of unexpectedness in the events I have chosen as my theme will be sufficient to challenge and incite everyone, young and old alike, to peruse my systematic history. For who is so worthless or indolent as not to wish to know by what means and under what system of polity the Romans in less than fifty-three years have succeeded in subjecting nearly the whole inhabited world to their sole government — a thing unique in history? Or who again is there so passionately devoted to other spectacles or studies as to regard anything as of greater moment than the acquisition of this knowledge?

"Speech to Danish working-class actors on the art of observation" [Rede an dänische Arbeiterschauspieler über die Kunst der Beobachtung] (1934), from The Messingkauf Poems, published in Versuche 14 (1955); trans. John Willett in Poems, 1913-1956, pp. 235-236
Poems, 1913-1956 (1976)

Man in the Modern Age (1933), p. 146

As quoted in A History of Militarism: Romance and Realities of a Profession (1937) by Alfred Vagts, p. 27.

In response to Time editor Edward Felsenthal question about how she dealt with all the haters
2020, Rolling Stone Interview: How one Swedish teenager armed with a homemade sign ignited a crusade and became the leader of a movement, Jack Davison, (March 2020)