Acting in your own best interest is the most natural, truthful thing a person can do. If it makes me feel good to give to charity I will. if it makes me happy to help clean the environment, I’ll recycle and drive less and all of that stuff. It’s out of love for myself... and if you can’t love yourself, why should anybody else love you? It’s that simple. Really.
I find that, because I love and understand who I am, I can find an understanding of everybody else (over time) and therefore love them in kind. When I notice a person is just happy to be breathing and doing, I gain a respect for them. Because life is so simple (despite what people may say). Life is doing and being and acting when the cause is just. And if you’re not living, your dying. I can’t explain it any simpler than that.
I love people because people love life... and when a person loves life, it makes me love life even more knowing that we share this single common bond. And it would make me happy to make them happy, because they deserve it. But please just realize, you do it all for yourself... and you can make a difference.