These do harm principally to barren minds.

They do harm to those who have no proper employment for their time, or to those, who in the manners, conversation, and conduct, of their parents, or others with whom they associate, have no examples of pure thinking, or of pure living, or of a pure taste.

Those, on the other hand, who have been taught to love good books, will never run after, or be affected by, bad ones.

And the same mode of reasoning, they conceive, is applicable to other cases.

For if people are taught to love virtue for virtue's sake, and, in like manner, to hate what is unworthy, because they have a genuine and living knowledge of its unworthiness, neither the ball, nor concert-room, nor the theatre, nor the circulating library, nor the diversions of the field, will have charms enough to seduce them, or to injure the morality of their minds." To sum up the whole.