Where in Il Saggiatore did Galileo write "The great book of philosophy is ever open before us..." ? Original?

Answer 1

A more exact quote would be:

"Philosophy is written in this grand book, the universe, which stands continually open to our gaze. But the book cannot be understood unless one first learns to comprehend the language and read the letters in which it is composed. It is written in the language of mathematics, and its characters are triangles, circles, and other geometric figures without which it is humanly impossible to understand a single word of it; without these, one is wandering around in a dark labyrinth.”

In my copy, translated by Drake, it is on page 237. Hope that helps.