The best Quotations

A man is only as old as the woman he feels.
- Groucho Marx

Do you know the writers of the following quotations?

Quotation All men by nature desire to know. - writer
Quotation Music is essentially useless, as life is: but both lend utility to their conditions. - writer
Quotation Society in every state is a blessing, but Government, even in its best state, is but a necessary evil; in its worst state, an intolerable one. - writer
Quotation I determined never to stop until I had come to the end and achieved my purpose. - writer
Quotation Actors die so loud. - writer
Quotation Between flattery and admiration there often flows a river of contempt. - writer