Julia Margaret Cameron
[Photographer, b. 1815, Calcutta, India, d. 1879, Kalutara, Ceylon.]
My aspirations are to ennoble Photography and to secure for it the character and uses of High Art by combining the Real and Ideal and sacrificing nothing of the Truth by all possible devotion to Poetry and Beauty.
(1864) 
Man Ray (Emanuel Radnitsky)
[Artist, b. 1890, Philadelphia, Pennsylvania, d. 1976, Paris.]
I am not one of those who say: “That water can is blue, that house is pink,” or those who say: “Nothing is beautiful but truth, only truth is pleasant.” There are better things to do in life than copy... Isn’t it this perpetual mania of imitation that prevents man from being a god? God (Judeo-Christian Version)
[Omnipotent artist, critic, creator and destroyer, before time, lives everywhere and nowhere.]
Driven back and utterly shamedShall be those who trust in an image.
(Judeo-Christian version of God; Isaiah 42:17)
Allan Sekula
[Photographer, writer, and theorist, b. 1951, Erie, Pennsylvania, d. 2013, Los Angeles.]
The only “objective” truth that photographs offer is the assertion that somebody or something... was somewhere and took a picture. Everything else, everything beyond the imprinting of a trace, is up for grabs. Edward Steichen
[Photographer and curator, b. 1879, Luxembourg, Germany, d. 1973, West Redding, Connecticut.]
Every photograph is a fake from start to finish. Robert Doisneau
[Photographer, b. 1912, Gentilly, Val-de-Marne, France, d. 1994, Montrouge, France.]
Photography is very subjective. Photography is not a document on which a report can be made. It is a subjective document. Photography is a false witness, a lie. W. Eugene Smith
[Photographer, b. 1918, Wichita, Kansas, d. 1978, Tucson, Arizona.]
With considerable soul searching, that to the utmost of my ability, I have let truth be the prejudice. Robert Rauschenberg
[Artist, b. 1925, Port Arthur, Texas, d. 2008, Captiva Island, Florida.]
Whatever is there [in the camera’s eye] is a truth, but a truth you have to believe in. What you see in front of you is a fact. You click when you believe it’s the truth.