“[E]verything in the reasoning of the founders pointed inexorably toward the incompatibility of liberty and equality with slavery…”

Source: Liberty, Equality, Fraternity (1873-1874), Ch. 1
Context: I am not the advocate of Slavery, Caste, and Hatred, nor do I deny that a sense may be given to the words, Liberty, Equality, and Fraternity, in which they may be regarded as good. I wish to assert with respect to them two propositions.
First, that in the present day even those who use those words most rationally — that is to say, as the names of elements of social life which, like others, have their advantages and disadvantages according to time, place, and circumstance — have a great disposition to exaggerate their advantages and to deny the existence, or at any rate to underrate the importance, of their disadvantages.
Next, that whatever signification be attached to them, these words are ill-adapted to be the creed of a religion, that the things which they denote are not ends in themselves, and that when used collectively the words do not typify, however vaguely, any state of society which a reasonable man ought to regard with enthusiasm or self-devotion.

As quoted in Memoirs of the Private and Public Life of William Penn : Who Settled the State of Pennsylvania, and Founded the City of Philadelphia (1827) by S. C. Stevens, p. 117

La sainteté des femmes est inconciliable avec les devoirs et les libertés du monde. Emanciper les femmes, c'est les corrompre.
Source: A Woman of Thirty (1842), Ch. III: At Thirty Years.

Source: Sociology For The South: Or The Failure Of A Free Society (1854), p. 61

I Think I'll Sit This One Out (1939)
Context: Justice alone knows liberty, equality, and fraternity, and justice is a human virtue arising from man's human capacity to reason. We cannot make sense out of justice by looking at the moon or taking dope or building battleships. We can make sense out of justice by using our reason to discover that justice, like wisdom, is better than rubies.

Source: Faith vs. Fact (2015), p. 258

The Liberty of Man, Woman and Child (1877)
Context: There is no slavery but ignorance. Liberty is the child of intelligence.
The history of man is simply the history of slavery, of injustice and brutality, together with the means by which he has, through the dead and desolate years, slowly and painfully advanced.

Emperor Has No Clothes Award acceptance speech (2003)
Context: I am a reasonably emotional person, and I see no reason why that's incompatible with being a scientist. Even if we learn about how everything works, that doesn't mean anything at all. You can reduce how an impala leaps to a bunch of biomechanical equations. You can turn Bach into contrapuntal equations, and that doesn't reduce in the slightest our capacity to be moved by a gazelle leaping or Bach thundering. There is no reason to be less moved by nature around us simply because it's revealed to have more layers of complexity than we first observed.
The more important reason why people shouldn't be afraid is, we're never going to inadvertently go and explain everything. We may learn everything about something, and we may learn something about everything, but we're never going to learn everything about everything. When you study science, and especially these realms of the biology of what makes us human, what's clear is that every time you find out something, that brings up ten new questions, and half of those are better questions than you started with.

"Subduing the Rebellion" (22 January 1862), as quoted in The Selected Works of Thaddeus Stevens http://books.google.com/books?id=A0Fs655TKfsC&printsec=frontcover&source=gbs_ge_summary_r&cad=0#v=onepage&q&f=false
1860s