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There are a lot of ways that people engage in service to others, but many are not exactly healthy. In order to do it in a healthy way one first has to feel like they are full and taken care of themselves. Then coming from that fullness and security they naturally focus on the needs of others, and simply let themselves flow like water going to where it is needed most. The self is full to the point of overflowing, not a dry desert trying to be the water of life for others.