Beseech you, sir, be merry. You have cause,
So have we all, of joy, for our escape
Is much beyond our loss.

– William Shakespeare

The Tempest, Act 2, Scene 1. Gonzalo tries to cheer up King Alonso, who is upset because his son Ferdinand is missing. He tells him that they have cause to be cheerful because they have escaped with their lives from the shipwreck. Gonzalo is the persistent and eternal optimist.