“It is all too easy to forget that there are emotional motivations in history, as well as economic ones.”

James Mirrlees in: Anders Barany, ‎Nobelstiftelsen (1996). Les Prix Nobel. p. 353

Source: Economics after the crisis : objectives and means (2012), Ch. 2 : Financial Markets: Efficiency, Stability, and Income Distribution

" http://jonestown.sdsu.edu/AboutJonestown/Tapes/Tapes/TapeTranscripts/Q265.html" FBI No. Q265 (17 October 1978)

Source: Sustainable History and the Dignity of Man (2009), p.27

Book II, 1109a.27.
Variant translation: Anybody can become angry, that is easy; but to be angry with the right person, and to the right degree, and at the right time, for the right purpose, and in the right way, that is not within everybody's power and is not easy.
As quoted in The Child: At Home and School (1944) by Edith M. Leonard, Lillian E. Miles, and Catherine S. Van der Kar, p. 203
Nicomachean Ethics

Source: Nationalism and Culture (1937), Ch. 1 "The Insufficiency of Economic Materialism"
Context: The deeper we trace the political influences in history, the more are we convinced that the "will to power" has up to now been one of the strongest motives in the development of human social forms. The idea that all political and social events are but the result of given economic conditions and can be explained by them cannot endure careful consideration. That economic conditions and the special forms of social production have played a part in the evolution of humanity everyone knows who has been seriously trying to reach the foundations of social phenomena. This fact was well known before Marx set out to explain it in his manner. A whole line of eminent French socialists like Saint–Simon, Considerant, Louis Blanc, Proudhon and many others had pointed to it in their writings, and it is known that Marx reached socialism by the study of these very writings.

The First Part, Chapter 5, p. 21 (See also: John Rawls).
Leviathan (1651)
Context: It is not easy to fall into any absurdity, unless it be by the length of an account; wherein he may perhaps forget what went before. For all men by nature reason alike, and well, when they have good principles. For who is so stupid as both to mistake in geometry, and also to persist in it, when another detects his error to him?
By this it appears that reason is not, as sense and memory, born with us; nor gotten by experience only, as prudence is; but attained by industry: first in apt imposing of names; and secondly by getting a good and orderly method in proceeding from the elements, which are names, to assertions made by connexion of one of them to another; and so to syllogisms, which are the connexions of one assertion to another, till we come to a knowledge of all the consequences of names appertaining to the subject in hand; and that is it, men call science. And whereas sense and memory are but knowledge of fact, which is a thing past and irrevocable, science is the knowledge of consequences, and dependence of one fact upon another; by which, out of that we can presently do, we know how to do something else when we will, or the like, another time: because when we see how anything comes about, upon what causes, and by what manner; when the like causes come into our power, we see how to make it produce the like effects.
Children therefore are not endued with reason at all, till they have attained the use of speech, but are called reasonable creatures for the possibility apparent of having the use of reason in time to come.