“Man is a clever animal who behaves like an imbecile.”

“For animals that are overworked, underfed, and cruelly treated; for all wistful creatures in captivity that beat their wings against bars; for any that are hunted or lost or deserted or frightened or hungry; for all that must be put to death...and for those who deal with them we ask a heart of compassion and gentle hands and kindly words.”

“We must fight against the spirit of unconscious cruelty with which we treat the animals. Animals suffer as much as we do. True humanity does not allow us to impose such sufferings on them. It is our duty to make the whole world recognize it. Until we extend our circle of compassion to all living things, humanity will not find peace.”

“In the past we have tried to make a distinction between animals which we acknowledge have some value and other which, having none, can be liquidated when we wish. This standard must be abandoned. Everything that lives has value simply as a living thing, as one of the manifestations of the mystery that is life.”

“A man does not have to be an angel to be a saint.”

“The tragedy of life is what dies inside a man while he lives.”

“Man has the lost the capacity to foresee and to forestall. He will end up destroying the earth.”