If so, we will have learned an important economic lesson.

We've learned some important lessons over the last two years.

They are about to learn some important lessons of life.

What are some of the most important lessons you have learned in your life?

What is the most important lesson you learned in life?

I'll think we've all learned an important lesson here today.

The most important lesson for her, she says, has been to stay away from the news and keep on living.

Asked what is the most important lesson for an art director to learn?

That may have been one of the more important lessons I've learned over the years.

But it was a place where she learned other important lessons.