Porcupine/species

Famous quotes containing the words porcupine and/or species:

“Mr. Treat is described as a Calvinist of the strictest kind, not one of those who, by giving up or explaining away, become like a porcupine disarmed of its quills, but a consistent Calvinist, who can dart his quills at a distance and courageously defend himself.”
—Henry David Thoreau (1817–1862)

“Genius detects through the fly, through the caterpillar, through the grub, through the egg, the constant individual; through countless individuals the fixed species; through many species the genus; through all genera the steadfast type; through all the kingdoms of organized life the eternal unity. Nature is a mutable cloud which is always and never the same.”
—Ralph Waldo Emerson (1803–1882)