“Passions are generally roused from great conflict.”

Source: Works of Samuel Johnson

Man and Socialism in Cuba (1965)
Context: Our task is to prevent the present generation, torn asunder by its conflicts, from becoming perverted and from perverting new generations. We must not bring into being either docile servants of official thought or scholarship students who live at the expense of the state — practising "freedom." Already there are revolutionaries coming who will sing the song of the new man in the true voice of the people. This is a process, which takes time.

The reference is to Charles Townshend (1725–1767)
First Speech on the Conciliation with America (1774)

"Lectures On The Elevation Of The Labouring Portion Of The Community: Lecture II", in The Works of William Ellery Channing, D.D. (1844) Vol. III, p. 81
Context: Undoubtedly some men are more gifted than others, and are marked out for more studious lives. But the work of such men is not to do others' thinking for them, but to help them to think more vigorously and effectually. Great minds are to make others great. Their superiority is to be used not to break the multitude to intellectual vassalage, not to establish over them a spiritual tyranny, but to rouse them from lethargy, and to aid them to judge for themselves. The light and life which spring up in one soul are to be spread far and wide. Of all treasons against humanity, there is no one worse than his, who employs great intellectual force to keep down the intellect of his less-favoured brother.

Source: Masks

Source: Democracy in America, Volume I (1835), Chapter X-XIV, Chapter XIII.

Source: The New Industrial State (1967), Chapter XXIX, Section 7, p. 339-340

The Ethics of Freedom (1973 - 1974)
Context: It seems to me that the free man, i. e., the man freed in Christ, ought to take parts in all movements that aim at human freedom. He obviously ought to oppose all dictatorship and oppression and all the fatalities which crush man. The Christian cannot bear it that others should be slaves. His great passion in the world ought to be a passion for the liberation of men.

p. 398

Book 6, chapter 12.
Books, Coningsby (1844), Henrietta Temple (1837)