Quotes and Sayings

“As long as Man continues to be the ruthless destroyer of lower living beings, he will never know health or peace. For as long as men massacre animals, they will kill each other. Indeed, he who sows the seed of murder and pain cannot reap joy and love.” Pythagoras of Samos (US /pɪˈθæɡərəs/;[1] UK /paɪˈθæɡərəs/;[2] Greek: Πυθαγόρας ὁ Σάμιος Pythagóras ho Sámios "Pythagoras the Samian", or simply Πυθαγόρας; Πυθαγόρης in Ionian Greek; c. 570 – c. 495 BC)[3][4] was an Ionian Greek philosopher, mathematician, and the putative founder of the movement called Pythagoreanism.

Plutarch
"It's not the one who abstains from eating meat to justify, but to those who eat it ."
Plutarch was born in Chaeronea in Boeotia 46 AD and died around 125 AD. He was a major thinker and historian of ancient Rome, originally coming from Greece.
Jeremy Bentham
"A full-grown horse or dog is beyond comparison a more rational, as well as a more conversible animal, than an infant of a day, a week or even a month old. But suppose the case were otherwise, what would it avail? The question is not, Can they reason? nor, Can they talk? but, Can they suffer?"
Jeremy Bentham (15 February 1748– 6 June 1832) was an English philosopher, jurist, and social reformer. He is regarded as the founder of modern utilitarianism.
Arthur Schopenhauer
"The assumption that animals are without rights and the illusion that our treatment of them has no moral significance is a positively outrageous example of Western crudity and barbarity. Universal compassion is the only guarantee of morality." from The Basis of Morality.
Arthur Schopenhauer was a German philosopher (22 February 1788 – 21 September 1860). He is best known for his 1818 work The World as Will and Representation, in which he characterizes the phenomenal world as the product of a blind, insatiable, and malignant metaphysical will. Source : Wikipedia 
Leo Tolstoy
"A man can live and be healthy without killing for food.. Therefore, if he eats meat, he participates in taking animal life merely for the sake of his appetite.. And to act so is immoral." Leo Tolstoy, (9 September [O.S. 28 August] 1828 – 20 November [O.S. 7 November] 1910) was a Russian writer who is regarded as one of the greatest authors of all time.
Mark Twain
Of all the animals, man is the only one that is cruel. He is the only one that inflicts pain for the pleasure of doing it. - "The Lowest Animal"
Samuel Langhorne Clemens (November 30, 1835 – April 21, 1910), better known by his pen name Mark Twain, was an American author and humorist. 
Peter Alexeievich Kropotkin
"Mutual aid is as much a law of animal life as mutual struggle; but that as a factor of evolution, it most probably has a far greater importance, inasmuch as it favors the development of such habits and characters as insure the maintenance and further development of the species, together with the greatest amount of welfare and enjoyment of life for the individual, with the least waste of energy."
Prince Peter Alexeievich Kropotkin (Пётр Алексе́евич Кропо́ткин) (9 December 1842 – 8 February 1921) was a Russian geographer, zoologist, and one of Russia's foremost anarchist social philosophers, famous for promoting forms of anarchist communism.
Bernard Shaw
On being asked why he was a vegetarian:
"Oh, come! That boot is on the other leg. Why should you call me to account for eating decently? If I battened on the scorched corpses of animals, you might well ask me why I did that."
The Vegetarian, 15 January 1898
George Bernard Shaw (26 July 1856 – 2 November 1950), known at his insistence simply as Bernard Shaw, was an Irish playwright, critic and polemicist whose influence on Western theatre, culture and politics extended from the 1880s to his death and beyond. 
Albert Einstein
"A human being is a part of the whole, called by us "Universe," a part limited in time and space.  He experiences himself, his thoughts and feelings as something separated 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 (1879 - 1955)
Grace Hopper 
"The most damaging phrase in the language is “We’ve always done it this way!”
Grace Brewster Murray, was an American computer scientist and United States Navy Rear Admiral.
Albert Schweitzer
"The time is coming, however, when people will be astonished that mankind needed so long a time to regard thoughtless injury to life as incompatible with ethics."
Albert Schweitzer, was a French-German theologian, organist, philosopher, and physician. He was Dale Lecturer at Mansfield College, Oxford, 1923
Martin Luther King
“One day the absurdity of the almost universal human belief in the slavery of other animals will be palpable. We shall then have discovered our souls and become worthier of sharing this planet with them.”
Martin Luther King, Jr. (January 15, 1929 – April 4, 1968) was an American Baptist minister and activist who was a leader in the African-American Civil Rights Movement. 
Ed Straker in UFO, a television series from 1969, says about the aliens that come to Earth to harvest organs from humans...:
"They look upon us not with animosity but with callousness as we look upon our animals whom we depend on for food."
Boris Cyrulnik 
«The day humans will understand that a thought without language exists with animalswe’ll die of shame to have them locked up in zoos and for having humiliated them with our laughter …». 
Boris Cyrulnik (birth 26 July 1937 in Bordeaux) is a French doctor, ethologist, neurologist, and psychiatrist.

Edward Freeman

“The awful wrongs and sufferings forced upon the innocent, helpless, faithful animal race, form the blackest chapter in the whole world's history”

R. Edward Freeman (born December 18, 1951) is an American philosopher and professor of business administration at the Darden School of the University of Virginia

Carl Sagan
"A sharp distinction between humans and "animals" is essential if we are to bend them to our will, make them work for us, wear them, eat them--without any disquieting tinges of guilt or regret. With untroubled consciences, we can render whole species extinct--for our perceived short-term benefit, or even through simple carelessness. Their loss is of little import: Those beings, we tell ourselves, are not like us. An unbridgeable gap gas thus a practical role to play beyond the mere stroking of human egos. Darwin's formulation of this answer was: "Animals whom we have made our slaves, we do not like to consider our equals.” 
― Carl Sagan, Shadows of Forgotten Ancestors

All of us cherish our beliefs. They are, to a degree, self-defining. When someone comes along who challenges our belief system as insufficiently well-based – or who, like Socrates, merely asks embarrassing questions that we haven’t thought of, or demonstrates that we’ve swept key underlying assumptions under the rug – it becomes much more than a search for knowledge. It feels like a personal assault.

Gary L. Francione
“Being vegan is easy. Are there social pressures that encourage you to continue to eat, wear, and use animal products? Of course there are. But in a patriarchal, racist, homophobic, and ableist society, there are social pressures to participate and engage in sexism, racism, homophobia, and ableism. At some point, you have to decide who you are and what matters morally to you. And once you decide that you regard victimizing vulnerable nonhumans is not morally acceptable, it is easy to go and stay vegan” 
― Gary L. Francione  is an American legal scholar. Francione is known for his work on animal rights theory
John Robbins
“Animals do not ‘give’ their life to us, as the sugar-coated lie would have it. No, we take their lives. They struggle and fight to the last breath, just as we would do if we were in their place.”
John Robbins is an American author, who popularized the links among nutrition, environmentalism, and animal rights. 
Michael Allen Fox
"Harming others is bad because it’s harmful, and what’s harmful is bad." 
From "Deep Vegetarianism". Professor Michael Allen Fox, is Adjunct Professor, School of Humanities, at the University of New England
Jonathan Safran Foer
“Not responding is a response--we are equally responsible for what we don't do. In the case of animal slaughter, to throw your hands in the air is to wrap your fingers around a knife handle.” Jonathan Safran Foer, Eating Animals
Andrew Gardiner 
"18th century comparative anatomy and 21st century genomics are actually linked in quite interesting ways. They're both concerned about humans and animals and the similarities and differences between them. And this is a discipline, which is called comparative medicine or today sometimes knows as One Medicine. And it really breaks down barriers between species, which in some senses are quite artificial. To vets who treat so many different animals, you can see that the human being is just another animal."
Dr Andrew Gardiner is Senior Lecturer at Royal (Dick) School of Veterinary Studies in Edinburgh and a vet specialising in the history and sociology of human-animal relations and the development of veterinary medicine as a discipline.
Aymeric Caron
"Animal rights are largely ignored by politicians, including ecologists " 
Aymeric Caron at the "Grand Journal " , April 27, 2016