It is the fate of every truth to be an object of ridicule when it is first acclaimed.

No one may shut his eyes to think the pain, which is therefore not visible to him, is non-existent.

A man is ethical only when life, as such, is sacred to him.

By ethical conduct toward all creatures, we enter into a spiritual relationship with the universe.

Those who experiment on animals should never be able to quiet their own conscience by telling themselves that these cruelties have a worthy aim.

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.

Don't stop to ask whether the animal or plant you meet deserves your sympathy, or how much it feels, or even whether it can feel at all: respect it and consider all life sacred.

We must never allow the voice of humanity within us to be silenced. It is humanity's sympathy with all creatures that first makes us truly human.