The best Quotations

Do you know the writers of the following quotations?

Quotation You must not suppose, because I am a man of letters, that I never tried to earn an honest living. - writer
Quotation A work of art that contains theories is like an object on which the price tag has been left. - writer
Quotation Man's course begins in a garden, but it ends in a city. - writer
Quotation Style is the dress of thoughts; and let them be ever so just, if your style is homely, coarse, and vulgar, they will appear to as much disadvantage, and be as ill received, as your person, though ever so well-proportioned, would if dressed in rags, dirt, and tatters. - writer
Quotation Showing up at school already able to read is like showing up at the undertaker's already embalmed: people start worrying about being put out of their jobs. - writer
Quotation Bankruptcy is a sacred state, a condition beyond conditions, as theologians might say, and attempts to investigate it are necessarily obscene, like spiritualism. One knows only that he has passed into it and lives beyond us, in a condition not ours. - writer