We are generally conscious of how we are perceived in our immediate social group, and would definitely like to create a good impression on how they perceive us.
But the real character of a person comes through once we observe how he behaves with the not so fortunate people. Those who are powerless and have absolutely no influence or control over you. Those who you think dont have anything substantial to offer you.
If someone treats them well , you can well be sure that the person is good.
Cause we can fake our goodness in anticipation of returns but only true goodness can make someone treat the not so fortunate well.