The best Quotations

My routines come out of total unhappiness. my audiences are my group therapy.
- Joan Rivers

Do you know the writers of the following quotations?

Quotation I don't know the rules of grammar. If you're trying to persuade people to do something, or buy something, it seems to me you should use their language. - writer
Quotation We must no more ask whether the soul and body are one than ask whether the wax and the figure impressed on it are one. - writer
Quotation All our progress is an unfolding, like a vegetable bud. You have first an instinct, then an opinion, then a knowledge as the plant has root, bud, and fruit. Trust the instinct to the end, though you can render no reason. - writer
Quotation I have never let my schooling interfere with my education. - writer
Quotation Difficult do you call it, Sir? I wish it were impossible. - writer
Quotation I'm not against the police; I'm just afraid of them. - writer