बन्धुत्वे भावितो बन्धुः परत्वे भावितः परः ।विषामृतदशेवेह स्थितिर्भावनिबन्धनी
In plain words
Conceived as kin, one is kin; conceived as other, one is other. As with the condition of poison and nectar, the state of things here is bound to one's conceiving.