“I am terrified of restrictive religious doctrine, having learned from history that when men who adhere to any form of it are in control, common men like me are in peril.”

Said to be his remarks on a draft of new troops sent to him in Spain (1809), as quoted in A New Dictionary of Quotations on Historical Principles from Ancient and Modern Sources (1942) by H. L. Mencken, this quote is disputed, and may be derived from a comment made to Colonel Robert Torrens about some of his generals in a despatch (29 August 1810): "As Lord Chesterfield said of the generals of his day, "I only hope that when the enemy reads the list of their names, he trembles as I do."
Disputed

Playboy interview (May 1995)
Context: At Bennington, I would go to a faculty meeting and be aware that everyone hated me. The men were appalled by a strong, loud woman. But I went to this auto shop and the men there thought I was cute. "Oh, there's that Professor Paglia from the college." The real men, men who work on cars, find me cute. They are not frightened by me, no matter how loud I am. But the men at the college were terrified because they are eunuchs, and I threatened every goddamned one of them.

Source: Seven Great Statesmen in the Warfare of Humanity with Unreason (1915), p. ix

Manuel, in Ch. XXXIX : The Passing of Manuel
Figures of Earth (1921)
Context: I am Manuel. I have lived in the loneliness which is common to all men, but the difference is that I have known it. Now it is necessary for me, as it is necessary for all men, to die in this same loneliness, and I know that there is no help for it.

As quoted in Woman Through the Ages;; (1908) by Emil Reich, p. 155

To Leon Goldensohn, July 14, 1946, from "The Nuremberg Interviews" by Leon Goldensohn, Robert Gellately - History - 2004.

Quarterly Review, 156, 1883, p. 570
1880s

Wording in Ideas and Opinions: Common to all these types is the anthropomorphic character of their conception of God. In general, only individuals of exceptional endowments, and exceptionally high-minded communities, rise to any considerable extent above this level. But there is a third stage of religious experience which belongs to all of them, even though it is rarely found in a pure form: I shall call it cosmic religious feeling. It is very difficult to elucidate this feeling to anyone who is entirely without it, especially as there is no anthropomorphic conception of God corresponding to it. The individual feels the futility of human desires and aims and the sublimity and marvelous order which reveal themselves both in nature and in the world of thought. Individual existence impresses him as a sort of prison and he wants to experience the universe as a single significant whole. The beginnings of cosmic religious feeling already appear at an early stage of development, e.g., in many of the Psalms of David and in some of the Prophets. Buddhism, as we have learned especially from the wonderful writings of Schopenhauer, contains a much stronger element of this. The religious geniuses of all ages have been distinguished by this kind of religious feeling, which knows no dogma and no God conceived in man's image; so that there can be no church whose central teachings are based on it. Hence it is precisely among the heretics of every age that we find men who were filled with this highest kind of religious feeling and were in many cases regarded by their contemporaries as atheists, sometimes also as saints. Looked at in this light, men like Democritus, Francis of Assisi, and Spinoza are closely akin to one another.
1930s, Religion and Science (1930)
Context: Common to all these types is the anthropomorphic character of the idea of God. Only exceptionally gifted individuals or especially noble communities rise essentially above this level; in these there is found a third level of religious experience, even if it is seldom found in a pure form. I will call it the cosmic religious sense. This is hard to make clear to those who do not experience it, since it does not involve an anthropomorphic idea of God; the individual feels the vanity of human desires and aims, and the nobility and marvelous order which are revealed in nature and in the world of thought. He feels the individual destiny as an imprisonment and seeks to experience the totality of existence as a unity full of significance. Indications of this cosmic religious sense can be found even on earlier levels of development—for example, in the Psalms of David and in the Prophets. The cosmic element is much stronger in Buddhism, as, in particular, Schopenhauer's magnificent essays have shown us. The religious geniuses of all times have been distinguished by this cosmic religious sense, which recognizes neither dogmas nor God made in man's image. Consequently there cannot be a church whose chief doctrines are based on the cosmic religious experience. It comes about, therefore, that we find precisely among the heretics of all ages men who were inspired by this highest religious experience; often they appeared to their contemporaries as atheists, but sometimes also as saints. Viewed from this angle, men like Democritus, Francis of Assisi, and Spinoza are near to one another.