These books clearly didn't show their true nature to just anyone.

He would have to show her the nature of his ring.

That shows the physical nature, what football is all about.

Sooner or later a woman will show her true nature.

And it shows the nature of the enemy we're working against.

John had shown his true nature when he abandoned her.

Seen and not heard etc so didn't show their 'true' nature.

That is what we should call showing the nature of the soul.

But it showed clearly the partisan nature of the issue.

From where I stood there was little to show the fearful nature of the attack.