The best Quotations

When a lot of remedies are suggested for a disease, that means it can't be cured.
- Anton Chekhov

Do you know the writers of the following quotations?

Quotation To vilify a great man is the readiest way in which a little man can himself attain greatness. - writer
Quotation The conscience of children is formed by the influences that surround them; their notions of good and evil are the result of the moral atmosphere they breathe. - writer
Quotation I gather from a lawyer that there was a rehearsal yesterday. We haven't a hope. I know the presiding judge too: I've had the misfortune to sleep with his wife. He was specially picked. - writer
Quotation The true measure of a man is how he treats someone who can do him absolutely no good. - writer
Quotation I think a compliment ought to always precede a complaint, where one is possible, because it softens resentment and insures for the complaint a courteous and gentle reception. - writer
Quotation Failure is in a sense the highway to success, as each discovery of what is false leads us to seek earnestly after what is true. - writer