Albert Einstein on Compassion

A human being is a part of the whole, called by us the 'Universe', a part limited in time and space. He experiences himself, his thoughts and feelings, as something separate from the rest - a kind of optical delusion of his consciousness. 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. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security.

-- Albert Einstein

Isaac Bashevis Singer on vegetarianism

People often say that humans have always eaten animals, as if this is a justification for continuing the practice. According to this logic, we should not try to prevent people from murdering other people, since this has also been done since the earliest of times.

Isaac Bashevis Singer,
Polish-born American author, winner of 1978 Nobel Prize in Literature, vegetarian for the last 35 years of his 88 years