The best Quotations

All civilization has from time to time become a thin crust over a volcano of revolution.
- Havelock Ellis

Do you know the writers of the following quotations?

Quotation The greatest power is often simple patience. - writer
Quotation I, John Brown, am now quite certain that the crimes of this guilty land will never be purged away but with Blood. - writer
Quotation I believe in Michelangelo, Velasquez, and Rembrandt; in the might of design, the mystery of color, the redemption of all things by Beauty everlasting, and the message of Art that has made these hands blessed. Amen. Amen. - writer
Quotation The greatest meliorator of the world is selfish, huckstering Trade. - writer
Quotation By depending on the great, The small may rise high. See: the little plant ascending the tall tree Has climbed to the top. - writer
Quotation Rome had Senators too, and that is why it declined. - writer