“We came equals into this world, and equals shall we go out of it.”

Source: Social Problems (1883), Ch. 21 : Conclusion
Context: Those who are most to be considered, those for whose help the struggle must be made, if labor is to be enfranchised, and social justice won, are those least able to help or struggle for themselves, those who have no advantage of property or skill or intelligence, — the men and women who are at the very bottom of the social scale. In securing the equal rights of these we shall secure the equal rights of all.
Hence it is, as Mazzini said, that it is around the standard of duty rather than around the standard of self-interest that men must rally to win the rights of man. And herein may we see the deep philosophy of Him who bade men love their neighbors as themselves.
In that spirit, and in no other, is the power to solve social problems and carry civilization onward.

The Book of Merlyn (1977)

Source: Science and Hypothesis (1901), Ch. VI: The Classical Mechanics (1905) Tr. https://books.google.com/books?id=5nQSAAAAYAAJ George Bruce Halstead
Context: What is mass? According to Newton, it is the product of the volume by the density. According to Thomson and Tait, it would be better to say that density is the quotient of the mass by the volume. What is force? It, is replies Lagrange, that which moves or tends to move a body. It is, Kirchhoff will say, the product of the mass by the acceleration. But then, why not say the mass is the quotient of the force by the acceleration?
These difficulties are inextricable.
When we say force is the cause of motion, we talk metaphysics, and this definition, if one were content with it, would be absolutely sterile. For a definition to be of any use, it must teach us to measure force; moreover that suffices; it is not at all necessary that it teach us what force is in itself, nor whether it is the cause or the effect of motion.
We must therefore first define the equality of two forces. When shall we say two forces are equal? It is, we are told, when, applied to the same mass, they impress upon it the same acceleration, or when, opposed directly one to the other, they produce equilibrium. This definition is only a sham. A force applied to a body can not be uncoupled to hook it up to another body, as one uncouples a locomotive to attach it to another train. It is therefore impossible to know what acceleration such a force, applied to such a body, would impress upon such an other body, if it were applied to it. It is impossible to know how two forces which are not directly opposed would act, if they were directly opposed.
We are... obliged in the definition of the equality of the two forces to bring in the principle of the equality of action and reaction; on this account, this principle must no longer be regarded as an experimental law, but as a definition.<!--pp.73-74

Speech to the annual meeting of the Union of Girls' Schools (27 October 1927), quoted in Our Inheritance (London: Hodder and Stoughton, 1938), pp. 150-151.
1927
Context: Your work in social service, whatever form it may take, requires exactly those two things that my work requires... patience and faith in human worth. Those are the real foundations of democracy, not equality in the sense in which that word is so often used. We are not all equal, and never shall be; the true postulate of democracy is not equality but the faith that every man and woman is worth while.

"Not Palaces" (l. 23–25)

Quoted in "Carrie Chapman Catt: A Public Life" by Jacqueline Van Voris (1996)

As quoted in "#MeToo not just about calling out sexual harassers" in The Korea Times (31 March 2018) http://www.koreatimes.co.kr/www/art/2018/04/398_245997.html?utm_source=dable

Guest lecture, UC Berkeley http://video.google.com/videoplay?docid=7582902000166025817 Oct. 5, 2005 – 40 min.

from fr. 17
Variant translations:
But come! but hear my words! For knowledge gained/Makes strong thy soul. For as before I spake/Naming the utter goal of these my words/I will report a twofold truth. Now grows/The One from Many into being, now/Even from one disparting come the Many--/Fire, Water, Earth, and awful heights of Air;/And shut from them apart, the deadly Strife/In equipoise, and Love within their midst/In all her being in length and breadth the same/Behold her now with mind, and sit not there/With eyes astonished, for 'tis she inborn/Abides established in the limbs of men/Through her they cherish thoughts of love, through her/Perfect the works of concord, calling her/By name Delight, or Aphrodite clear.
tr. William E. Leonard
On Nature
Context: But come, hear my words, since indeed learning improves the spirit. Now as I said before, setting out the bounds of my words, I shall speak twice over. As upon a time One came to be alone out of many, so at another time it divided to be many out of One: fire and water and earth and the limitless vault of air, and wretched Strife apart from these, in equal measure to everything, and Love among them, equal in length and breadth. Consider [Love] in mind, you, and don't sit there with eyes glazing over. It is a thing considered inborn in mortals, to their very bones; through it they form affections and accomplish peaceful acts, calling it Joy or Aphrodite by name.