Famous quotes containing the words key and/or exchange:
“Every revolution was first a thought in one man’s mind, and when the same thought occurs in another man, it is the key to that era.”
—Ralph Waldo Emerson (1803–1882)
“We never exchange more than three words with a Friend in our lives on that level to which our thoughts and feelings almost habitually rise.”
—Henry David Thoreau (1817–1862)