How to use "madness" in a sentence

All the talk about death and fear and madness and pain seemed to have taken place further back in the past than a mere few seconds ago

or madness

But this seemed to be just another proof of her madness.

'Isn't my poor sister-in-law's extreme interest in flies just one sign of her madness?'

It was clear to me that the great tragedy in which he was involved - it seemed that he had escaped from Weybridge - had driven him to the edge of madness.