Never mind your happiness; do your duty.

Country

It may be true that you can't fool all the people all the time, but you can fool enough of them to rule a large country.

Family

The family is the nucleus of civilization.

History and Historians

One of the lessons of history is that nothing is often a good thing to do and always a clever thing to say.

Morality

Moral codes adjust themselves to environmental conditions.

Teachers and Teaching

Woe to him who teaches men faster than they can learn.