There is the saying that sharing is caring. It is what parents teach kids at an early age. Someone who shares their time, energy, knowledge, and resources with others is showing them that they truly care about their well being. When you take this course of action, you will have a positive impact on that person and society because that person is more likely to give back in the future as well. Humans operate on a modeling basis, thus we tend to mimic our environment. When we help others, the world is better off. An added benefit is that we feel great about ourselves as well by taking this path.