Famous quotes containing the words closed and/or shell:
“No domain of nature is quite closed to man at all times.”
—Henry David Thoreau (1817–1862)
“I do not know what I may appear to the world; but to myself I seem to have been only like a boy playing on the seashore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.”
—Isaac Newton (1642–1727)