[There is] in every one, two men, the wise and the foolish, and... each of them must be allowed his turn. If you would have the wise, the grave, the serious, always to rule and have sway, the fool would grow so peevish and troublesome, that he would put the wise man out of order, and make him fit for nothing: he must have his times of being let loose to follow his fancies, and play his gambols, if you would have your business go on smoothly. - Anthony Ashley Cooper, Lord Shaftsbury, to John Locke.
