Joseph Beuys Quote
I think art is the only political power, the only revolutionary power, the only evolutionary power, the only power to free humankind form all repression. I say not that art has already realized this, on the contrary, and because it has not, it has to be developed as a weapon, at first there are radical levels, then you can speak about special details.
Quoted in: Robert C. Morgan (1978). The Role of Documentation in Conceptual Art: : An Aesthetic Inquiry. p. 176. - 'I Am Searching For Field Character,' 1973/74