Seeking happiness is not the problem. The problem is that we often do not know where and how to find genuine happiness and so make the mistakes that cause suffering for ourselves & others.
The difference between a life laced through with frustration and one sustained by happiness depends on whether it is motivated by self-hatred or by real love for oneself.
The more we identify and acknowledge moments when we’re unable to share in someone else’s pleasure and ask ourselves whether another person’s happiness truly jeopardizes our own, the more we pave the way for experiencing sympathetic joy