The best Quotations

Do you know the writers of the following quotations?

Quotation Beware what you set your heart upon. For it shall surely be yours. - writer
Quotation The final purpose of art is to intensify, even, if necessary, to exacerbate, the moral consciousness of people. - writer
Quotation He that speaks much, is much mistaken. - writer
Quotation I have only one yardstick by which I test every major problem - and that yardstick is: Is it good for America? - writer
Quotation My conscience hath a thousand several tongues, and every tongue brings in a several tale, and every tale condemns me for a villain. - writer
Quotation Birth, copulation and death. That's all the facts when you come to the brass tacks. - writer