“Sensitivity is the principle of all action. A being, albeit animated, who would feel nothing, would never act, for what would its motive for acting be? God himself is sensitive since he acts. All men are therefore sensitive, and perhaps to the same degree, but not in the same manner. There is a purely passive physical and organic sensitivity which seems to have as its end only the preservation of our bodies and of our species through the direction of pleasure and pain. There is another sensitivity that I call active and moral which is nothing other than the faculty of attaching our affections to beings who are foreign to us. This type, about which study of nerve pairs teaches nothing, seems to offer a fairly clear analogy for souls to the magnetic faculty of bodies. Its strength is in proportion to the relationships we feel between ourselves and other beings, and depending on the nature of these relationships it sometimes acts positively by attraction, sometimes negatively by repulsion, like the poles of a magnet. The positive or attracting action is the simple work of nature, which seeks to extend and reinforce the feeling of our being; the negative or repelling action, which compresses and diminishes the being of another, is a combination produced by reflection. From the former arise all the loving and gentle passions, and from the latter all the hateful and cruel passions.”
Second Dialogue; translated by Judith R. Bush, Christopher Kelly, Roger D. Masters
Dialogues: Rousseau Judge of Jean-Jacques (published 1782)
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Jean Jacques Rousseau 91
Genevan philosopher 1712–1778Related quotes

“We cannot be more sensitive to pleasure without being more sensitive to pain.”
Source: The Wisdom of Insecurity: A Message for an Age of Anxiety

as quoted in Futurism, ed. Didier Ottinger; Centre Pompidou / 5 Continents Editions, Milan, 2008, p. 154.
1914 - 1916

1900s, The Moral Equivalent of War (1906)
Context: Without risks or prizes for the darer, history would be insipid indeed; and there is a type of military character which every one feels that the race should never cease to breed, for everyone is sensitive to its superiority. The duty is incumbent on mankind, of keeping military character in stock — if keeping them, if not for use, then as ends in themselves and as pure pieces of perfection, — so that Roosevelt's weaklings and mollycoddles may not end by making everything else disappear from the face of nature.

Statement to the American Association for the Advancement of Science, in Boston, Massachusetts (27 August 1880): published as "On the Production and Reproduction of Sound by Light" in American Journal of Sciences, Third Series, vol. XX, n°118 (October 1880), pp. 305-324.

Source: Way Station (1963), Ch. 21
Context: It's not the machine itself that does the trick. The machine merely acts as an intermediary between the sensitive and the spiritual force. It is an extension of the sensitive. It magnifies the capability of the sensitive and acts as a link of some sort. It enables the sensitive to perform his function.

Inside Information p. 7
The Book on the Taboo Against Knowing Who You Are (1966)

Consecrated women and men are ‘witnesses to the beauty of God’ https://www.vaticannews.va/en/vatican-city/news/2021-03/cardinal-de-aviz-25-anniversary-vita-consecrata-exhortation.html (25 March 2021)