Famous quotes containing the words unknown and/or smiling:
“The process of discovery is very simple. An unwearied and systematic application of known laws to nature causes the unknown to reveal themselves.”
—Henry David Thoreau (1817–1862)
“The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside.”
—Sir Arthur Conan Doyle (1859–1930)