“It is often the case that people of noble character and great mental gifts betray a strange lack of worldly wisdom and a deficiency in the knowledge of men, more especially when they are young; with the result that it is easy to deceive or mislead them; and that, on the other hand, natures of the commoner sort are more ready and successful in making their way in the world.
The reason of this is that, when a man has little or no experience, he must judge by his own antecedent notions; and in matters demanding judgment, an antecedent notion is never on the same level as experience. For, with the commoner sort of people, an antecedent notion means just their own selfish point of view. This is not the case with those whose mind and character are above the ordinary; for it is precisely in this respect — their unselfishness — that they differ from the rest of mankind; and as they judge other people's thoughts and actions by their own high standard, the result does not always tally with their calculation.
But if, in the end, a man of noble character comes to see, as the effect of his own experience, or by the lessons he learns from others, what it is that may be expected of men in general, — namely, that five-sixths of them are morally and intellectually so constituted that, if circumstances do not place you in relation with them, you had better get out of their way and keep as far as possible from having anything to do with them, — still, he will scarcely ever attain an adequate notion of their wretchedly mean and shabby nature: all his life long he will have to be extending and adding to the inferior estimate he forms of them; and in the meantime he will commit a great many mistakes and do himself harm.”
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Arthur Schopenhauer,
Counsels and Maxims