History also teaches us two deeper lessons about what separates successful societies from those heading toward failure.

But I think there's a deeper, more profound lesson we're already learning.

Indeed, the deeper lesson we should drive home is that space will never be safe.

In the whole topography of the Pilgrim's Progress there lies many a deep lesson.

His meditations had always been best when he moved, and he was certain there was some deep lesson to be learned from that, too.

The police had also learned deeper lessons from earlier confrontations.

Most had not learned the deeper lesson of the Tyrant, that violence builds its own limits.

While my boys left the movie marveling at the special effects, I left wondering about the deeper lesson.

They absorb deep lessons about a democratic society and have already begun to influence China.

And there are deeper lessons that could change things in Britain, too.