If you're saying something that people don't want to hear or accept, a significant proportion of them will reply with hostility. Not because they know the facts, or because they have researched it themselves, but because they're so psychologically involved in believing good news that they will oppose it with a reflex.
Investment bubbles and high animal spirits do not materialize out of thin air. They need extremely favorable economic fundamentals together with free and easy, cheap credit, and they need it for at least two or three years. Importantly, they also need serial pleasant surprises in such critical variables as global GNP growth.