Whoever instructs the cynic gets insulted; whoever corrects the wicked gets hurt.
References for Proverbs 9:7
Don't correct the impudent, or they will hate you; correct the wise, and they will love you.
Teach the wise, and they will become wiser; inform the righteous, and their learning will increase.
The beginning of wisdom is the fear of the LORD; the knowledge of the holy one is understanding.
Through me your days will be many; years will be added to your life.
If you are wise, it is to your benefit; if you are cynical, you will bear it all alone.