The science of ecology teaches us that everything in the universe is connected. We cannot separate ourselves from the consequences of even the least of our actions: whatever we do here comes back there. This is the law of the unity of life. Like gravity or any other law of nature, you cannot break it; you can only break yourself against it.
If you throw a bottle into the air, it will return to earth and shatter. Similarly, if you act in a way that violates the unity of life – polluting the atmosphere, wasting precious resources, ignoring the needs of others – you will find your health, your peace of mind, and your happiness destroyed. We are not separate fragments. Like all the animals and plants, we depend on each other and on the environment.
– Eknath Easwaran