The friendship between two uterine brothers, the love between husband and wife, rests upon interest. I do not know any kind of love amongst persons that does not depend upon some motive of self-interest. It is sometimes seen that uterine brothers or husband and wife having quarrelled are united again from a natural affection. But such a thing is not to be seen in persons who are not connected with one another.
सख्यं सोदर्ययोर्धात्रोर्दम्पत्योर्वा परस्परम्॥ कस्यचिन्नाभिजानामि प्रीति निष्कारणामिह। यद्यपि भ्रातरः क्रुद्धा भार्या वा कारणान्तरे॥ स्वभावतस्ते प्रीयन्ते नेतरः प्रीयते जनः।