Very little of the great cruelty shown by men can really be attributed to
cruel instinct.  Most [All?] of it comes from thoughtlessness or inherited habit.  The
roots of cruelty, therefore, are not so much strong as widespread.  But the time must
come when inhumanity protected by custom and thoughtlessness will succumb
before humanity championed by thought.  Let us work that this time may come.  
Albert Schweitzer

It is not enough to avoid the physical harming of creation but also to avoid hurting
hearts through speech.
David Shiva

When a man wantonly destroys one of the works of man we call him a vandal.
When he destroys one of the works of God we call him a sportsman [livestock
Joseph Wood Krutch

If a man aspires towards a righteous life, his first act of abstinence is from injury to
Albert Einstein

Where the love of God is verily perfected and the true spirit of government
watchfully attended to, a tenderness toward all creatures made subject to us will be
experienced, and a care felt in us that we do not lessen that sweetness of life in the
animal creation which the great Creator intends for them.
John Woolman - Quaker preacher and abolitionist who attacked slavery and
cruelty to animals.

I have from an early age abjured the use of meat, and the time will come when
men such as I will look on the murder of animals as they now look on the murder of
men.  Leonardo da Vinci

It is an important and popular fact that things are not always what they seem.
For instance, on the planet Earth, man had always assumed that he was more
intelligent than dolphins because he had achieved so much - the wheel, New York,
war and so on - whilst all the dolphins had ever done is muck about in the water
having a good time.  But conversely, the dolphins had always believed that they
were far more intelligent than man - for precisely the same reasons.
Douglas Adams (Hitchhiker's Guide to the Galaxy)

If he be really and seriously seeking to live a good life, the first thing from which he
will abstain will always be the use of animal food, because ...its use is simply
immoral, as it involves the performance of an act which is contrary to the moral
feeling -- killing.
Leo Tolstoy

There are vibrations to every food. Meat is the densest, the most gross, the slowest,
then dairy, then vegetables. Fruit vibrates closest to pure light.
Fruitarian Network

The highest realms of thought are impossible to reach without first attaining an
understanding of compassion.

Take sides. Neutrality helps the oppressor, never the victim. Silence encourages the
tormentor, never the tormented.
Elie Wiesel

Nothing more strongly arouses our disgust than cannibalism, yet we make the same
impression on Buddhists and vegetarians, for we feed on babies, though not our
own.  Robert Louis Stevenson

"Thou shalt not kill" does not apply to murder of one's own kind only, but to all living
beings; and this Commandment was inscribed in the human breast long before it
was proclaimed from Sinai.  
Leo Tolstoy

If one person is unkind to an animal it is considered to be cruelty, but where a lot of
people are unkind to animals, especially in the name of commerce, the cruelty is
condoned and, once large sums of money are at stake, will be defended to the last
by otherwise intelligent people.
Ruth Harrison (Animal Machines)

Whatever your work or life circumstances may be, the power to make a positive
difference for others, be they two-legged or four-legged, resides within us all.
Hope Tarr

It is no measure of health to be well adjusted to a profoundly sick society.

When a chimpanzee mother comforts her frightened infant, we say that she is
behaving like a human; when a human being resorts to insane violence, we say
that he is acting like an animal.
Perhaps it's the other way around....
Wayne Grady

“I am sometimes asked, “Why do you spend so much of your time and money
talking about kindness to the animals when there is so much cruelty to men?” I
answer, “I am working at the roots.”
Georg T. Angell

No humane being, past the thoughtless age of boyhood, will wantonly murder any
creature which holds its life by the same tenure that he does.  
Henry David Thoreau

Vegans get plenty. --- Spiral Diner, Fort Worth Texas

I once had a sparrow alight on my shoulder for a moment while I was hoeing in a
village garden, and I felt that I was more distinguished by that circumstance than I
should have been by any epaulet I could have worn.  
Henry David Thoreau

The chief cause of pain to me was the knowledge of the untold sufferings of animals.
... it seemed to be incredible - this was even before I was old enough to go to
school - that I should include only human beings in my evening prayers. So when
my mother had heard my prayers and kissed me good-night, I said secretly another
prayer, which I had composed myself, for all living creatures: "Dear God, protect
and bless all creatures that have breath; save them from all evil and let them sleep
in peace and quietness."
Albert Schweitzer

Dear Lord, I've been asked, nay commanded, to thank Thee for the Christmas
turkey before us... a turkey which was no doubt a lively, intelligent bird... a social
being... capable of actual affection... nuzzling its young with almost human-like
compassion.  Anyway, it's dead and we're gonna eat it.  Please give our respects to
its family.  
Berke Breathed, Bloom County Babylon

The day may come when the rest of the animal creation may acquire those rights
which never could have been withholden from them but by the hand of tyranny.
Jeremy Bentham, philosopher

You put a baby in a crib with an apple and a rabbit. If it eats the rabbit and plays
with the apple, I'll buy you a new car.
Harvey Diamond

I said in mine heart concerning the estate of the sons of men, that God might
manifest them, and that they might see that they themselves are beasts. For that
which befalleth the sons of men befalleth beasts; even one thing befalleth them: as
the one dieth, so dieth the other; yea, they have all one breath; so that a man hath
no preeminence above a beast: for all is vanity.

Please put the ladybug outside without harming her.
Winston Churchill to his butler.