We will gradually become indifferent to what goes on in the minds of other people when we acquire an adequate knowledge of the superficial and futile nature of their thoughts, of the narrowness of their views, of the paltriness of their sentiments, of the perversity of their opinions, and of the number of their errors. We shall then see that whoever attaches a lot of value to the opinions of others pays them too much honour.
~ Arthur Schopenhauer