When he went into a belly laugh, the pictures shook on the walls. He had this big, happy, hearty European bellow.

For me, a hearty 'belly laugh' is one of the beautiful sounds in the world.

A hearty laugh lightens the heart.

It's only the meat and potatoes. When you are looking through the textbook, you're not seeing all the pictures and things. I mean, it just looks boring compared to other math books.

One man's theology is another man's belly laugh.

This has been very gratifying. Customers like the open approach, and when they're happy, we're happy.