“I have no reason to suppose that Lenin gained his ideas from my books; but if that were true, I should be not a little proud of having contribute to the intellectual development of a man who seems to me to be at once the greatest theoretician of socialism since Marx and a statesman whose genius recalls that of Peter the Great.”

Letter to Gerling (1832)

Part 3: "Feynman, The Bomb, and the Military", "Los Alamos from Below", p. 132
Surely You're Joking, Mr. Feynman! (1985)

Source: The Birth of Fascist Ideology: From Cultural Rebellion to Political Revolution, 1994, p. 197

Source: Quotes of Salvador Dali, 1961 - 1970, Diary of a Genius (1964), p. 1

The Liberty of Man, Woman and Child (1877)
Context: Standing in the presence of the Unknown, all have the same right to think, and all are equally interested in the great questions of origin and destiny. All I claim, all I plead for, is liberty of thought and expression. That is all. I do not pretend to tell what is absolutely true, but what I think is true. I do not pretend to tell all the truth.
I do not claim that I have floated level with the heights of thought, or that I have descended to the very depths of things. I simply claim that what ideas I have, I have a right to express; and that any man who denies that right to me is an intellectual thief and robber. That is all.

Source: The Night Land (1912), Chapter 15

Speech to Devonshire Conservatives (January 1892), as quoted in The Marquis of Salisbury (1892), by James J. Ellis, p. 185
Variant: The only true lasting benefit which the statesman can give to the poor man is so to shape matters that the greatest possible liberty for the exercise of his own moral and intellectual qualities should be offered to him by law.
As quoted in Salisbury — Victorian Titan (1999) by Andrew Roberts
1890s
Context: We must learn this rule, which is true alike of rich and poor — that no man and no class of men ever rise to any permanent improvement in their condition of body or of mind except by relying upon their own personal efforts. The wealth with which the rich man is surrounded is constantly tempting him to forget the truth, ad you see in family after family men degenerating from the position of their fathers because they live sluggishly and enjoy what has been placed before them without appealing to their own exertions. The poor man, especially in these days, may have a similar temptation offered to him by legislation, but this same inexorable rule will work. The only true lasting benefit which the statesman can give to the poor man is so to shape matters that the greatest possible opportunity for the exercise of his own moral and intellectual qualities shall be offered to him by the law; and therefore it is that in my opinion nothing that we can do this year, and nothing that we did before, will equal in the benefit that it will confer upon the physical condition, and with the physical will follow the moral too, of the labouring classes in the rural districts, that measure for free education which we passed last year. It will have the effect of bringing education home to many a family which hitherto has not been able to enjoy it, and in that way, by developing the faculties which nature has given to them, it will be a far surer and a far more valuable aid to extricate them from any of the sufferings or hardships to which they may be exposed than the most lavish gifts of mere sustenance that the State could offer.

p, 125
1850s, Autobiographical Sketch Written for Jesse W. Fell (1859)

Source: The Time Axis (1949), Ch. 2 : The Stain and the Stone