“Passion and prejudice govern the world; only under the name of reason. It is our part, by religion and reason joined, to counteract them all we can.”

Letter (16 April 1802)

“Neither History Nor Praxis,” pp. 38-39.
Outside Ethics (2005)

Source: The Limits of Evolution, and Other Essays, Illustrating the Metaphysical Theory of Personal Ideaalism (1905), The Right Relation of Reason to Religion, p.224-5

The Unity of Religious Ideals, Part I : Seeking for the Ideal.
The Spiritual Message of Hazrat Inayat Khan

"The Passion of Antoine Lavoisier", p. 366
Bully for Brontosaurus (1991)

Part 3, Section 3
Part 3, Section 3
Source: A Treatise of Human Nature (1739-40), Book 2: Of the passions
Context: We speak not strictly and philosophically when we talk of the combat of passion and of reason. Reason is, and ought only to be the slave of the passions, and can never pretend to any other office than to serve and obey them.
Context: What may at first occur on this head, is, that as nothing can be contrary to truth or reason, except what has a reference to it, and as the judgments of our understanding only have this reference, it must follow, that passions can be contrary to reason only so far as they are accompany'd with some judgment or opinion. According to this principle, which is so obvious and natural, `tis only in two senses, that any affection can be call'd unreasonable. First, When a passion, such as hope or fear, grief or joy, despair or security, is founded on the supposition or the existence of objects, which really do not exist. Secondly, When in exerting any passion in action, we chuse means insufficient for the design'd end, and deceive ourselves in our judgment of causes and effects. Where a passion is neither founded on false suppositions, nor chuses means insufficient for the end, the understanding can neither justify nor condemn it. `Tis not contrary to reason to prefer the destruction of the whole world to the scratching of my finger. `Tis not contrary to reason for me to chuse my total ruin, to prevent the least uneasiness of an Indian or person wholly unknown to me. `Tis as little contrary to reason to prefer even my own acknowledge'd lesser good to my greater, and have a more ardent affection for the former than the latter. A trivial good may, from certain circumstances, produce a desire superior to what arises from the greatest and most valuable enjoyment; nor is there any thing more extraordinary in this, than in mechanics to see one pound weight raise up a hundred by the advantage of its situation. In short, a passion must be accompany'd with some false judgment. in order to its being unreasonable; and even then `tis not the passion, properly speaking, which is unreasonable, but the judgment.

As reported by Alexander Polyhistor, and Diogenes Laërtius in Lives and Opinions of Eminent Philosophers, "Pythagoras", Sect. 30, in the translation of C. D. Yonge (1853)

The Righteous Mind (2012)

Let those materials be moulded into general intelligence, sound morality, and in particular, a reverence for the constitution and laws: and, that we improved to the last; that we remained free to the last; that we revered his name to the last; that, during his long sleep, we permitted no hostile foot to pass over or desecrate his resting place; shall be that which to learn the last trump shall awaken our WASHINGTON.
Upon these let the proud fabric of freedom rest, as the rock of its basis; and as truly as has been said of the only greater institution, "the gates of hell shall not prevail against it".
1830s, The Lyceum Address (1838)