Hafiz said this quote

To better understand people, don't just judge them based on how they treat you; rather, look deeply to see how they treat their families, friends and strangers. A lot of people tend to be extremely nice in the process of getting the things they want or need, but would show their true colors after they have succeeded with their agendas. So always bear in mind that a person who has a good heart loves being nice to their friends, family, partner and strangers.