Famous quotes containing the words single and/or sign:
“Philosophy is written in this grand book—I mean the universe—
which stands continually open to our gaze, but it cannot be understood unless one first learns to comprehend the language and interpret the characters in which it is written. It is written in the language of mathematics, and its characters are triangles, circles, and other geometrical figures, without which it is humanly impossible to understand a single word of it.”
—Galileo Galilei (1564–1642)
“Every sign by itself seems dead. What gives it life?—In use it is alive. Is life breathed into it there?—Or is the use its life?”
—Ludwig Wittgenstein (1889–1951)