“If the world is to change for the better it must start with a change in human consciousness, in the very humanness of modern man.”

Source: On Nietzsche (1945), p. xxviii

On The Crucible, in a 1987 interview; as quoted in "Arthur Miller, Moral Voice of American Stage, Dies at 89" by Marilyn Berger in The New York Times (11 February 2005) http://www.nytimes.com/2005/02/11/theater/newsandfeatures/11cnd-miller.html?ei=5070&en=3842d0df3195ba4c&ex=1148356800&adxnnlx=1148209567-ZnjnGzbndB3P1XvCU5BNDg&pagewanted=all&position=
Context: I was very moved by that play once again when the Royal Shakespeare Company did a production that toured the cathedrals of England. Then they took it to Poland and performed it in the cathedrals there, too. The actors said it changed their lives. Officials wept; they were speechless after the play, and everyone knew why. It was because they had to enforce the kind of repression the play was attacking. That made me prouder than anything I ever did in my life. The mission of the theater, after all, is to change, to raise the consciousness of people to their human possibilities.

Afro-Asian Conference (1965)
Context: Socialism cannot exist without a change in consciousness resulting in a new fraternal attitude toward humanity, both at an individual level, within the societies where socialism is being built or has been built, and on a world scale, with regard to all peoples suffering from imperialist oppression.

Source: Patriotism and Christianity http://en.wikisource.org/wiki/Patriotism_and_Christianity (1896), Ch. 17
Context: One man does not assert the truth which he knows, because he feels himself bound to the people with whom he is engaged; another, because the truth might deprive him of the profitable position by which he maintains his family; a third, because he desires to attain reputation and authority, and then use them in the service of mankind; a fourth, because he does not wish to destroy old sacred traditions; a fifth, because he has no desire to offend people; a sixth, because the expression of the truth would arouse persecution, and disturb the excellent social activity to which he has devoted himself.
One serves as emperor, king, minister, government functionary, or soldier, and assures himself and others that the deviation from truth indispensable to his condition is redeemed by the good he does. Another, who fulfils the duties of a spiritual pastor, does not in the depths of his soul believe all he teaches, but permits the deviation from truth in view of the good he does. A third instructs men by means of literature, and notwithstanding the silence he must observe with regard to the whole truth, in order not to stir up the government and society against himself, has no doubt as to the good he does. A fourth struggles resolutely with the existing order as revolutionist or anarchist, and is quite assured that the aims he pursues are so beneficial that the neglect of the truth, or even of the falsehood, by silence, indispensable to the success of his activity, does not destroy the utility of his work.
In order that the conditions of a life contrary to the consciousness of humanity should change and be replaced by one which is in accord with it, the outworn public opinion must be superseded by a new and living one. And in order that the old outworn opinion should yield its place to the new living one, all who are conscious of the new requirements of existence should openly express them. And yet all those who are conscious of these new requirements, one in the name of one thing, and one in the name of another, not only pass them over in silence, but both by word and deed attest their exact opposites.

Until the Final Hour : Hitler's Last Secretary (2004) edited by Melissa Müller, Foreword, p. 3.
Context: We should listen to the voice of conscience. It does not take nearly as much courage as one might think to admit to our mistakes and learn from them. Human beings are in this world to learn and to change themselves in learning.

Homecoming saga, The Memory Of Earth (1992)

"Three Methods Of Reform" in Pamphlets : Translated from the Russian (1900) as translated by Aylmer Maude, p. 29
As quoted in The Artist's Way at Work : Riding the Dragon (1999) by Mark A. Bryan with Julia Cameron and Catherine A. Allen, p. 160
Variant: Everyone thinks of changing the world, but no one thinks of changing himself.