The myth is that we are each alone, that we are separate from each other, from all else.
The truth is that we are all interconnected, no one is truly alone. That invisible web of interconnection binds us all to all others. each entity is part of each other entity from the inner being to the ends of the universe. Yet our consciousness does not enable us to see or even comprehend this reality. Thus we think ourselves separate, we fail to see the unity between ourselves and the oak tree or the stranger sitting on a bench in the park. yet indeed we areal inextricably connected. Thus it is that to hare another is to harm oneself and to help another is to help oneself. The celebration of another's good fortune is honoring that connection and makes one stronger whereas the begrudging of another's good fortune or the celebration of another's suffering is denial of that interconnection ans creates loss.
Thus the saying, "Hate the action, not the person."
Peace to all