How to use "understanding" in a sentence

In every dark hour of our national life, a leadership of frankness and of vigor has met with that understanding and support of the people themselves which is essential to victory

Champmathieu went home in a state of total confusion, thinking all men mad and understanding nothing of what had happened.

'Do you want a secretary?' I asked, not understanding him.

I stared at him, not understanding.

In a flash of understanding, she saw through to the heart of the mystery

but he's reaching out to me." She struggled to explain the understanding that had come to her in the diner

I smiled at Miss Marple's humorous understanding of her own character.

It was interesting that he, an ordinary soldier, seemed to have a much better understanding of the situation than I, a professional writer.

George is a little slow at understanding a joke sometimes.