The best Quotations

I believe there's no proverb but what is true; they are all so many sentences and maxims drawn from experience, the universal mother of sciences.
- Miguel de Cervantes

Do you know the writers of the following quotations?

Quotation To make your children capable of honesty is the beginning of education. - writer
Quotation Conversation is an art in which a man has all mankind for competitors. - writer
Quotation That's what an army is - a mob; they don't fight with courage that's born in them, but with courage that's borrowed from their mass, and from their officers. - writer
Quotation Its easy to have principles when you're rich. The important thing is to have principles when you're poor. - writer
Quotation May I kiss you then? On this miserable paper? I might as well open the window and kiss the night air. - writer
Quotation I find in most novels no imagination at all. They seem to think the highest form of the novel is to write about marriage, because that's the most important thing there is for middle-class people. - writer