Sentence examples for this is a lesson from inspiring English sources

This is a lesson in "trust us".

This is a lesson lost in Washington.

This is a lesson worth remembering.

This is a lesson in managing conflicts.

This is a lesson worth heeding.

This is a lesson everybody needs to remember.

This is a lesson we'd like to teach ourselves.

This is a lesson American businesses learned long ago.

This is a lesson of history that will never end.

This is a lesson we learned the hard way.

This is a lesson others have taken to heart.