What are dark horse comics?

Famous quotes containing the words dark and/or horse:

“Through the dark cold and the empty desolation,
The wave cry, the wind cry, the vast waters
Of the petrel and the porpoise. In my end is my beginning.”
—T.S. (Thomas Stearns)

“We read that the traveller asked the boy if the swamp before him had a hard bottom. The boy replied that it had. But presently the traveller’s horse sank in up to the girths, and he observed to the boy, “I thought you said that this bog had a hard bottom.” “So it has,” answered the latter, “but you have not got half way to it yet.” So it is with the bogs and quicksands of society; but he is an old boy that knows it.”
—Henry David Thoreau (1817–1862)