why is the author comparig love and selfishness

Dear Sekhar, they say love and selfishness are twins. Swami Vivekananda says" Love is expansion and selfishness is contraction." He compares love with selfishness because  is difficult to love someone beyond yourself if you are selfish. By being selfish, we are limiting and confining this world to negativity. Love is cheerful, joyous, compassionate, forgiving, generous. Love is patient. It is kind. It does not envy and does not boast. Love does not keep a record of wrongs. Love protects, trusts, hopes and preserves. None of them are even possible with selfishness. Love never fails but selfishness fails you. So, it is only apt that the author compare love with selfishness.

Hello student please help me with the novel/book which you're talking about so that I can provide you exact information. There's no comparison between love and selfishness but surely there's some reason that's why the author is comparing these two.

Feel free to comment if you have any doubt
Good luck