Optics, developing in us through study, teach us to see.

We must not be content to memorize the beautiful formulas of our illustrious predecessors. Let us go out and study beautiful nature.

The awareness of our own strength makes us modest.

But optics sharp it needs, I ween, To see what is not to be seen.

We should have the blind to teach us how to see.

Keep good company - that is, go to the Louvre.