It's important to note that giving of oneself provides meaning, relief from helplessness, and connection. It is not selfish to take care of oneself, of course, so one has more to give. Yet, at the same time, remember that giving is receiving. Observing and protecting nature, wildlife, or those who depend on it, has infinite energy to restore, renew, and revitalize. literally.
Also, our taxes and public programs do not provide enough for everyone, but if the elite privileged paid their fair share, we would all be better off mentally and emotionally, as well as physically. The rich would not be nearly so mentally ill, disconnected, etc.for example.