just a figure of speech

My grandmother always told my mother, “Pretty is as pretty does.”

And my mother always told me, “Pretty is as pretty does.”

And now I am telling my kids, “Pretty is as pretty does.”

Which we all know is just another way to say,

what you do is more important than how you look.

Who you are matters more than what you wear.

It’s the inside that counts.

It doesn’t matter what the outside looks like if the inside is rotten.

You know,

pretty is as pretty does.

How do you say that to your kids?