Rohinton Mistry said this quote

Curious, he thought, how, if you knew a person long enough, he could elicit every kind of emotion from you, every possible reaction, envy, admiration, pity, irritation, fury, fondness, jealousy, love, disgust. But in the end all human beings became candidates for compassion, all of us, without exception...and if we could recognize this from the beginning, what a saving in pain and grief and misery.