"Nature is man's inorganic body -- that is to say, nature insofar as it is not the human body. Man lives from nature -- i.e., nature is his body -- and he must maintain a continuing dialogue with it is he is not to die. To say that man's physical and mental life is linked to nature simply means that nature is linked to itself, for man is a part of nature."

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Learning to explain phenomena such that one continues to be fascinated by the failure of one's explanations creates a continuing cycle of thinking, that is the crux of intelligence. It isn't that one person knows more than another, then. In as sense, it is important to know less than the next person, or at least to be certain of less, thus enabling more curiosity and less explaining away because one has again encountered a well-known phenomenon. The less you know the more you can find out about, and finding out for oneself is what intelligence is all about.

— Roger Schank