You're made of much sterner stuff, as well you know.

Was it simply that they were made of sterner stuff?

But he was made of sterner stuff than even they realized.

Unfortunately, she was made of sterner stuff than he'd thought.

We must show them that Americans are made of sterner stuff.

People really were made of sterner stuff in those days.

But she was made of sterner stuff than even I had thought.

Well, I think our military is of sterner stuff than that.

However, it seems as if the country at large is made of sterner stuff.

Really, he had thought his chief assistant was made of sterner stuff.