A man's interest in the world is only an overflow from his interest in himself.

I don't believe in principle, but I do in interest.

If I seem to give a damn, please tell me. I would hate to be giving the wrong impression.

Interest makes some people blind, and others quick-sighted.

No use to shout at them to pay attention. If the situations, the materials, the problems before the child do not interest him, his attention will slip off to what does interest him, and no amount of exhortation of threats will bring it back.

Only free peoples can hold their purpose and their honor steady to a common end and prefer the interest of mankind to any narrow interest of their own.

The virtues and vices are all put in motion by interest.

There are no uninteresting things, there are only uninterested people.