Think how different human societies would be if they were based on love rather than justice. But no such societies have ever existed on earth.

All genuine learning is active, not passive. It involves the use of the mind, not just the memory. It is a process of discovery, in which the student is the main agent, not the teacher.

Friendship is a very taxing and arduous form of leisure activity.

The purpose of learning is growth, and our minds, unlike our bodies, can continue growing as we continue to live.

Wonder is the beginning of wisdom in learning from books as well as from nature.

Ask others about themselves, at the same time, be on guard not to talk too much about yourself.

The rules for reading yourself to sleep are easier to follow than are the rules for staying awake while reading. Get into bed in a comfortable position, make sure the light is inadequate enough to cause slight eyestrain, choose a book that is either terribly difficult or terribly boring-in any event, one that you do not really care whether you read or not-and you will be asleep in a few minutes. Those who are experts in relaxing with a book do not have to wait for nightfall. A comfortable chair in the library will do any time