I hesitate to predict whether this theory is true. But if the general opinion of Mankind is optimistic then we're in for a period of extreme popularity for science fiction. David Eddings
I think maybe I'm just a little too optimistic? I hope for the best in every situation and want to see the good in people. Ryan Lochte
I would feel more optimistic about a bright future for man if he spent less time proving that he can outwit Nature and more time tasting her sweetness and respecting her seniority. E.B.White
Introspection and preserved writings give us far more insight into the ways of past humans than we have into the ways of past dinosaurs. For that reason, I'm optimistic that we can eventually arrive at convincing explanations for these broadest patterns of human history. Jared Diamond
My own nature hovers between neurotic and paranoid. I've developed the habit of mentally listing things that make me optimistic about the future. I do it every day. Martha Beck