Silly children grow into ordinary men. I know no generalisation more certain than this. It is the most difficult thing in the world to distinguish between genuine stupidity, and that apparent and deceitful stupidity which is the sign of a strong character. At first sight it seems strange that the two extremes should have the same outward signs; and yet it may well be so, for at an age when man has as yet no true ideas, the whole difference between the genius and the rest consists in this: the latter only take in false ideas, while the former, finding nothing but false ideas, receives no ideas at all. In this he resembles the fool; the one is fit for nothing, the other finds nothing fit for him. The only way of distinguishing between them depends upon chance, which may offer the genius some idea which he can understand, while the fool is always the same. As a child, the young Cato was taken for an idiot by his parents; he was obstinate and silent, and that was all they perceived in him; it was only in Sulla's ante-chamber that his uncle discovered what was in him. Had he never found his way there, he might have passed for a fool till he reached the age of reason. Had Caesar never lived, perhaps this same Cato, who discerned his fatal genius, and foretold his great schemes, would have passed for a dreamer all his days. Those who judge children hastily are apt to be mistaken; they are often more childish than the child himself. I knew a middle-aged man, [Footnote: The Abbe de Condillac] whose friendship I esteemed an honour, who was reckoned a fool by his family. All at once he made his name as a philosopher, and I have no doubt posterity will give him a high place among the greatest thinkers and the profoundest metaphysicians of his day.