“I have from an early age abjured the use of meat, and 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

"The love for all living creatures is the most noble attribute of man. There is no fundamental difference between man and animals in their ability to feel pleasure and pain, happiness, and misery.” ― Charles Darwin

"But for the sake of some little mouthful of meat, 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." ― Hippocrates 

“He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals."  ― Immanuel Kant

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

“For as long as men massacre animals, they will kill each other.” ― Pythagoras

“Non-violence leads to the highest ethics, which is the goal of all evolution. Until we stop harming all other living beings, we are still savages.” ― Thomas Edison

"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.

“Until we extend our circle of compassion to all living things, humanity will not find peace.” ― Albert Schweitzer

“Nothing will benefit health and increase the chances for survival of life on Earth as the evolution to a vegetarian diet. If the whole world adopts vegetarianism, it can change the destiny of humankind.” ― Albert Einstein