This has been one of my favorite quotes for years.
I just came across it again and feel it is so worth sharing.

“A human being is part of a whole… [but] he experiences himself, his thoughts and feelings as something separated from the rest… This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty.”                                                        –Albert Einstein