Philosophy of Galileo

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, with out which it is humanly impossible to understand a single work of it; without these, one is wandering around in a dark labyrinth.