The purpose of our life needs to be positive. We weren't born with the purpose of causing trouble, harming others. For our life to be of value, I think we must develop basic good human qualities - warmth, kindness, compassion. Then our life becomes meaningful and more peaceful - happier.
Dalai Lama (2009). “The Art of Happiness, 10th Anniversary Edition: A Handbook for Living”, p.59, Penguin
