Sadhguru
Why should I stop focusing on other people's faults and criticising them?
What you dwell on in others grows in you
Every person has a good side and a nasty side, and whatever you pay attention to will grow, at least for you. So recognise the best in people, and you will kindle, nurture and receive the best of everyone.
If you pay attention to the nasty side of people, your mind gets preoccupied with that nastiness, and somebody else's nastiness becomes yours.