I will not kill or hurt any living creature needlessly, nor destroy any beautiful thing, but will strive to save and comfort all gentle life, and guard and perfect all natural beauty upon the earth. 

But for the sake of some little mouthful of flesh we deprive a soul of the sun and light, and of that proportion of life and time it had been born into the world to enjoy.

Until one has loved an animal, a part of one's soul remains unawakened. 

If people are good only because they fear punishment, then we are a sorry lot indeed. 

He should not kill a living being, nor cause it to be killed, nor should he incite another to kill. Do not injure any being, either strong or weak, in the world.

The real voyage of discovery lies not in seeking new landscapes, but in having new eyes. 

The question is not, "Can they reason?" nor, "Can they talk?" but "Can they suffer?” 

He who sows the seed of murder and pain cannot reap joy and love.

As long as Man continues to be the ruthless destroyer of lower living beings, he will never know health or peace.

They are called into existence by human artifice that they may drag out a short and miserable existence of slavery and disease, that their bodies may be mutilated, their social feelings outraged. It were much better that a sentient being should never have existed, than that it should have existed only to endure unmitigated misery.