Someone who has one of the three qualities in effect must have the two others.
The Sages said that there are three signs that distinguish descendants of Israel: They are merciful, kind, and modest.
To fulfill these criteria one does not necessarily have to be a “saint” just to judge one’s reactions all other things being equal:
MERCY: Do you feel sympathy for others? Do you believe in social justice? Do you try to take account of the sensitivities of others?
ALTRUISM: KIND: Are you kind to others? At the least do you feel that needless suffering should not be inflicted on others but rather where possible good be done unto them?
MODESTY: Are you prepared to do good and act worthily even though you may receive no reward or recognition and perhaps even suffer because of it?