A good definition of optimism:
“The medieval fable of the criminal hauled before the king to plead for his life and successfully does so by promising if the king spared his life for a year, he could teach the king’s horse to sing.
When the criminal got back to his cell, his cellmate scoffed at him: you could never teach his horse to sing if you had a lifetime. And the man said ‘No matter. I have a year now I didn’t have before. And a lot of things can happen in a year. The king might die. The horse might die. I might die. And who knows? Maybe the horse will sing.’ “