“Every man is a prisoner, and the greatest irony of all is to be the prisoner of another man.”

Golden Sayings of Epictetus
Context: You are impatient and hard to please. If alone, you call it solitude: if in the company of men, you dub them conspirators and thieves, and find fault with your very parents, children, brothers and neighbours. Whereas when by yourself you should have called it Tranquillity and Freedom: and herein deemed yourself like unto the Gods. And when in the company of the many, you should not have called it a wearisome crowd and tumult, but an assembly and a tribunal; and thus accepted all with contentment. What then is the chastisement of those who accept it not? To be as they are. Is any discontented with being alone? let him be in solitude. Is any discontented with his parents? let him be a bad son, and lament. Is any discontented with his children? let him be a bad father.—"Throw him into prison!"—What prison?—Where he is already: for he is there against his will; and wherever a man is against his will, that to him is a prison. Thus Socrates was not in prison since he was there with his own consent. (31 & 32).

Eliza Dushku Interview - "The New Guy" http://movies.about.com/library/weekly/aa050202b.htm by Rebecca Murray and Fred Topel.

Source: Competing for the Future, 1996, p. 54
Context: Acquired through business schools and other educational experiences and from consultants and management gurus, absorbed from peers and the business press, and formed out of career experiences, a manager's genetic coding establishes the range and likelihood of responses in particular situations.... All of us are prisoners, to one degree or another, of our experience.

Source: The Savage Detectives

Original: (it) Quando il fascino di una donna domina il pensiero, l'uomo ne diventa prigioniero.
Source: prevale.net

Voltaire (1916)
Context: Voltaire was not the first or last man to convert a prison into a hall of fame. A prison is confining to the body, but whether it affects the mind, depends entirely upon the mind.
It was while in prison that he changed his name from the one his father gave him — Arouet — to the one he has made famous throughout all time — Voltaire. He said, "I was very unlucky under my first name. I want to see if this one will succeed any better."

Source: Incarceron

Word Play (1974)
Context: About 1932 one of Sapir's students at Yale, Benjamin Lee Whorf drew on Sapir's ideas and began an intensive study of the language of the Hopi Indians of Arizona. Whorf's brilliant analysis... seemed to support the view that man is a prisoner of his language. Whorf emphasized grammar—rather than vocabulary, which had previously intrigued scholars—as an indicator of the way a language can direct a speaker into certain habits of thought.