“There is no fundamental difference between man and animals in their [ability to] feel pleasure and pain, happiness and misery.”
― Charles Darwin

“The time will come when men such as I will look upon the murder of animals as they now look upon the murder of men.”
― Leonardo da Vinci

“Until we stop harming all other living beings, we are still savages.” 
― Thomas Edison

“However scrupulously the slaughterhouse is concealed in the graceful distance… there is complicity.” 
― Ralph Waldo Emerson

“I choose not to make a graveyard of my body for the rotting corpses of dead animals.” 
“Animals are my friends…and I don’t eat my friends.” 
― George Bernard Shaw

“A person can [be] healthy without killing animals for food. Therefore, if one eats meat, s/he participates in taking animal life merely for the sake of his appetite… to act so is immoral.” 
― Leo Tolstoy

“Thou shalt not kill” does not only apply to murder of one’s own kind, but to all living beings. And this Commandment was inscribed in the human heart long before it was proclaimed from [the Holy Land].” 
― Leo Tolstoy

“If a man aspires towards a righteous life, his first act of abstinence is from injury to animals.” 
― Albert Einstein

“Nothing will benefit health and increase the chances for survival of life on Earth as the evolution to a vegetarian diet.”
― Albert Einstein

“People often say that humans have always eaten animals, as if this is a justification for continuing the practice. According to this logic, we should not try to prevent people from murdering, [raping or enslaving] other people, since this has also been done since the earliest of times.”
― Isaac Bashevis Singer

“A human body in no way resembles those that were born for [meat-eating]; it has no hawk’s beak, no sharp claws, no roughness of teeth… If you will contend that you were born to [eat meat, then] kill what you eat. But do it yourself, without the help of a chopping-knife, as wolves, bears, and lions do, who kill and eat at once. [Kill a cow with your] teeth… tear a lamb in pieces… and eat it raw as they do.”
― Plutarch

“As long as people massacre animals, they will kill each other.. those who sows the seed of murder and pain cannot reap joy and love.”
― Pythagoras

“Those who exclude any of God’s creatures from the shelter of compassion will deal likewise with their fellow man.”
― St. Francis of Assisi

“As long as there are slaughterhouses, there will be battlefields.” 
― Leo Tolstoy

“It is a matter of taking the side of the weak against the strong, something the best people have always done.” 
― Harriet Beecher Stowe, author “Uncle Tom’s Cabin”

“The greatness of a nation and its moral progress can be judged by the way its animals are treated.” 
― Mahatma Gandhi

“People must have renounced… all natural intelligence to dare to advance that animals are but animated machines… Those who can make you believe absurdities can make you commit atrocities.” 
― Voltaire

“In their behavior toward creatures, all men are Nazis.” 
― Isaac Bashevis Singer, Nobel Laureate

“Grandchildren will ask us one day: ‘Where were you during the Holocaust of the animals? What did you do against these horrifying crimes?’ We won’t be able to offer the same excuse for the second time: that we didn’t know.”
― Dr. Helmut Kaplan

“A long habit of not thinking a thing wrong, gives it a superficial appearance of being right.”
― Thomas Paine, Common Sense

“My body will not be a tomb for other creatures.” 
― Leonardo da Vinci