"Let us account for all we see by the facts we know. If there are things for which we cannot account, let us wait for light. To account for anything by supernatural agencies is, in fact to say that we do not know. Theology is not what we know about God, but what we do not know about Nature."

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People dont realize that we cannot forecast the future. What we can do is have probabilities of what causes what, but thats as far as we go. And Ive had a very successful career as a forecaster, starting in 1948 forward. The number of mistakes I have made are just awesome. There is no number large enough to account for that.

— Alan Greenspan