“Treat a man as he is, and he will remain as he is. Treat a man as he could be, and he will become what he should be.”

The Fantastic Imagination (1893)
Context: "But a man may then imagine in your work what he pleases, what you never meant!"
 Not what he pleases, but what he can. If he be not a true man, he will draw evil out of the best; we need not mind how he treats any work of art! If he be a true man, he will imagine true things: what matter whether I meant them or not? They are there none the less that I cannot claim putting them there! One difference between God's work and man's is, that, while God's work cannot mean more than he meant, man's must mean more than he meant. For in everything that God has made, there is layer upon layer of ascending significance; also he expresses the same thought in higher and higher kinds of that thought: it is God's things, his embodied thoughts, which alone a man has to use, modified and adapted to his own purposes, for the expression of his thoughts; therefore he cannot help his words and figures falling into such combinations in the mind of another as he had himself not foreseen, so many are the thoughts allied to every other thought, so many are the relations involved in every figure, so many the facts hinted in every symbol. A man may well himself discover truth in what he wrote; for he was dealing all the time with things that came from thoughts beyond his own.

Source: Clockwork Angel

Quoted in Gently And Firmly By C.P. Varkey, p. 87

About Abraham Lincoln (1864), as quoted in Reconstruction: America's Unfinished Revolution, 1863-1877 https://books.google.com/books?id=cwVkgrvctCcC&printsec=frontcover&dq=%22Eric+Foner%22+%22Republicans%22&hl=en&sa=X&ved=0ahUKEwiOwdup3aLLAhVK7SYKHZufDmUQ6AEIRjAH#v=onepage&q&f=false, by Eric Foner, p. 6
1860s

Source: The Door Into Summer (1957), Chapter 1

Sec. 95
Some Thoughts Concerning Education (1693)
Context: A father would do well, as his son grows up, and is capable of it, to talk familiarly with him; nay, ask his advice, and consult with him about those things wherein he has any knowledge or understanding. By this, the father will gain two things, both of great moment. The sooner you treat him as a man, the sooner he will begin to be one; and if you admit him into serious discourses sometimes with you, you will insensibly raise his mind above the usual amusements of youth, and those trifling occupations which it is commonly wasted in. For it is easy to observe, that many young men continue longer in thought and conversation of school-boys than otherwise they would, because their parents keep them at that distance, and in that low rank, by all their carriage to them.

Source: How to Take the Ex Out of Ex-Boyfriend

Paul D. Zimmerman, (February 17, 1975) "The Mad Mad Mel Brooks", Newsweek

This quote is itself quoting Floyd 'Red Crow' Westerman in the film Grey Owl (1999)
Examples of self-translation (c. 2004), Quotes - Zitate - Citations - Citazioni