“The inversion of external compulsion into the compulsion of conscience … produces the machine-like assiduity and pliable allegiance required by the new rationality.”

1930s, Mein Weltbild (My World-view) (1931)
Context: In human freedom in the philosophical sense I am definitely a disbeliever. Everybody acts not only under external compulsion but also in accordance with inner necessity. Schopenhauer's saying, that "a man can do as he will, but not will as he will," has been an inspiration to me since my youth up, and a continual consolation and unfailing well-spring of patience in the face of the hardships of life, my own and others'. This feeling mercifully mitigates the sense of responsibility which so easily becomes paralyzing, and it prevents us from taking ourselves and other people too seriously; it conduces to a view of life in which humor, above all, has its due place.

Source: Sex & sensibility (1992), p. 20

General Survey
The Function of the Orgasm (1927)

Arcades (1630-1634), line 68
Source: The Complete Poetry

Source: The Mystery of Religion (1924), pp. 52-53

short quotes, 3 April 1972; p. 86
1970's, Conversations with Samuel Beckett and Bram van Velde (1970 - 1972)

Source: Cheaters

Young India (13 September 1928). All Men Are Brothers: Autobiographical Reflections, compiled and edited by Krishna Kripalani, The Continuum, (2011) p. 34
1920s

As quoted in The Columbia Book of Quotations (1993) edited by R. Andrews http://books.google.com/books?id=4cl5c4T9LWkC, p. 894.
Original quote from Herodotus, The Histories http://www.perseus.tufts.edu/hopper/text?doc=Hdt.%208.111&lang=original (8.111): "(2)...for the men of that place, the first islanders of whom Themistocles demanded money, would not give it. When, however, Themistocles gave them to understand that the Athenians had come with two great gods to aid them, Persuasion and Necessity, and that the Andrians must therefore certainly give money, they said in response, “It is then but reasonable that Athens is great and prosperous, being blessed with serviceable gods."
Herodotus: Original Greek http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A1999.01.0125%3Abook%3D8%3Achapter%3D111: (2) πρῶτοι γὰρ Ἄνδριοι νησιωτέων αἰτηθέντες πρὸς Θεμιστοκλέος χρήματα οὐκ ἔδοσαν, ἀλλὰ προϊσχομένου Θεμιστοκλέος λόγον τόνδε, ὡς ἥκοιεν Ἀθηναῖοι περὶ ἑωυτοὺς ἔχοντες δύο θεοὺς μεγάλους, πειθώ τε καὶ ἀναγκαίην, οὕτω τέ σφι κάρτα δοτέα εἶναι χρήματα, ὑπεκρίναντο πρὸς ταῦτα λέγοντες ὡς κατὰ λόγον ἦσαν ἄρα αἱ Ἀθῆναι μεγάλαι τε καὶ εὐδαίμονες, αἳ καὶ θεῶν χρηστῶν ἥκοιεν εὖ... (via Perseus Project)
Herodotus is quoted by Plutarch in Themistocles http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0066%3Achapter%3D21%3Asection%3D1 (21.1): he said he came escorting two gods, Persuasion and Compulsion. ( Greek http://www.perseus.tufts.edu/hopper/text?doc=Perseus%3Atext%3A2008.01.0074%3Achapter%3D21%3Asection%3D1: "δύο γὰρ ἥκειν ἔφη θεοὺς κομίζων, Πειθὼ καὶ Βίαν")
NOTE the two different sets of "gods" in the Original Greek: πειθώ http://www.perseus.tufts.edu/hopper/morph?l=*peiqw%5C&la=greek&can=*peiqw%5C0&prior=komi/zwn&d=Perseus:text:2008.01.0074:chapter=21:section=1&i=1 τε καὶ ἀναγκαίην http://www.perseus.tufts.edu/hopper/morph?l=a%29nagkai%2Fhn&la=greek&can=a%29nagkai%2Fhn0&prior=kai\&d=Perseus:text:1999.01.0125:book=8:chapter=111&i=1 (Herodotus); Πειθὼ http://www.perseus.tufts.edu/hopper/morph?l=*peiqw%5C&la=greek&can=*peiqw%5C0&prior=komi/zwn&d=Perseus:text:2008.01.0074:chapter=21:section=1&i=1 καὶ Βίαν http://www.perseus.tufts.edu/hopper/morph?l=*bi%2Fan&la=greek&can=*bi%2Fan0&prior=kai\&d=Perseus:text:2008.01.0074:chapter=21:section=1&i=1 (Plutarch)