The Buddha once said this to the Bhikkhus:
"Bhikkhus, as to the source through which perceptions and notions tinged by mental proliferation beset a man: if nothing is found there to delight in, welcome and hold to,
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Cultivate harmony within yourself, and harmony becomes real;
Cultivate harmony within your family, and harmony becomes fertile;
Cultivate harmony within your community, and harmony becomes abundant;
Cultivate harmony within your culture, and harmony becomes enduring;
Cultivate harmony within the world, and harmony becomes ubiquitous.
Live with a person to understand that person;
Live with a family to understand that family;
Live with a community to understand that community;
Live with a culture to understand that culture;
Live with the world to understand the world.