Music, reveling, and laughter are heard, muffled, within. Then amid a louder burst of them Osio strides angrily forth. He is followed in argumentative elation by Rizzio—clothed in Greek raiment, a book in his hand—and by Bruno.

Osio (as they come down).

Proof from the teeth of aliens and fools

And infidels that follow their own reason?

I want no proof! your books should burn in Hell!

Rizzio (gaily).

Because they glorify the stars in heaven?

Osio.

I say they are heresy!

Rizzio.