Phrases with «to be a lesson to someone»

Is it even possible that, if there's a lesson to learn, this will be the appropriate and effective method of teaching it? (sbnation.com)
And as is always the case, there was a lesson to learn from every session we attended! (impactadhd.com)
And there are lessons to take away from this story that are enormously relevant to each and every one of you, so pay attention. (entrepreneur.com)
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