I keep my house, gentlemen, as a useful lesson to you.

We can learn a useful lesson by understanding why he said this.

They said the attack would serve as a useful lesson that not enough attention was being paid to computer security.

In the meantime, maybe there's a useful lesson for the rest of us.

He usually learns a really useful lesson in the process.

Any minute now I might fall for someone else, which is a useful lesson, when the movie's over, especially.

"Then we would have gotten some useful lessons out of this scandal."

It was a collaboration with some useful lessons for British companies.

We are therefore able to draw useful lessons from the experience of others.

They may also get a useful lesson in how wrong it is to be prejudiced.