परो अपि हितवान् बन्धु: ,बन्धु: अपि अहित: पर: |
अहित: देहज: व्याधि: , हितम् आरण्यम् औषधम् ||
The person with whom we have no relation, but who helps us in our difficult times is our Real relative/brother. In contrast the person who may be our relative/brother (With whom we have blood relations) but who always does bad things for us should not be considered as our relative/brother. Just like a disease which is in our own body does so much harm to us while the medicinal plant which grows in forest far off does so much of good to us!