The best Quotations

Do you know the writers of the following quotations?

Quotation We may admit that our groping is often inspired, but we must be on our guard against the belief, however deeply felt, that our inspiration carries any authority, divine or otherwise. - writer
Quotation An original is a creation motivated by desire. Any reproduction of an originals motivated be necessity. It is marvelous that we are the only species that creates gratuitous forms. To create is divine, to reproduce is human. - writer
Quotation The ideal has many names, and beauty is but one of them. - writer
Quotation We who in engage in nonviolent direct action are not the creators of tension. We merely bring to the surface the hidden tension that is already alive. - writer
Quotation I am to be broken. I am to be derided all my life. I am to be cast up and down among these men and women, with their twitching faces, with their lying tongues, like a cork on a rough sea. Like a ribbon of weed I am flung far every time the door opens. - writer
Quotation It is silly to call fat people ''gravitationally challenged'' - a self-righteous fetishism of language which is no more than a symptom of political frustration. - writer