“Physical activity is a powerful natural savelife, as it activates the production of endorphins, that give euphoria and pleasure, and of serotonin, that regulates the tone of mood.”

Benedetto Croce, The Philosophy of Giambattista Vico. trans. R. G. Collingwood, London 1923.

Source: "The theory of economic regulation," 1971, p. 3
Context: Regulation may be actively sought by an industry, or it may be thrust upon it. A central thesis of this paper is that, as a rule, regulation is acquired by the industry and is designed and operated primarily for its benefit. There are regulations whose net effects upon the regulated industry are undeniably onerous; a simple example is the differentially heavy taxation of the industry's product (whiskey, playing cards). These onerous regulations, however, are exceptional and can be explained by the same theory that explains beneficial (we may call it "acquired") regulation.

On depression and suicide
Context: Guitar. com: he tone of Euphoria Morning is kind of melancholy.

Sermon preach at St. Marys, December 10, 1661, in Twelve Sermons Preached Upon Several Occasions (1727), Vol. 3, p. 140

De Lineas, Anguilis et Figurisas quoted by A.C. Crombie, Robert Groseesteste and the Origins of Experimental Science 1100-1700 (1953) citing Baur, Ludwig (ed.) Die Philosophischen Werke des Robert Grosseteste, Bischofs von Lincoln (1912)
Context: Power from natural agents may go by a short line, and then in its activity greater... But if by a straight line then its action is stronger and better, as Aristotle says in Book V of the Physics, because nature operates in the shortest way possible. But the straight line is the shortest of all, as he says in the same place.

I, q. 92, art. 1, ad 1
Summa Theologica (1265–1274)

Walter W. Powell and Kaisa Snellman. "The knowledge economy." Annu. Rev. Sociol. 30 (2004): 199-220.

Cited in: Rex Robert Dolan (1967). The big change: the challenge to radical change in the Church.
Source: The step to man, 1966, p.178.

How to be happy though rich or poor (1930)