Arthur Schopenhauer
Without any doubt was one of the most influential philosophers. Given below are some of my favorite quotes by him:
"A man can do whatever he wants, but not want, what he wants"
"It is difficult to find happiness within oneself, but it is impossible to find it anywhere else."
"A man can be himself only so long as he is alone; and if he does not love solitude, he will not love freedom; for it is only when he is alone that he is really free."
"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."
"Compassion for animals is intimately associated with goodness of character, and it may be confidently asserted that he who is cruel to animals cannot be a good man."
"We forfeit three-fourths of ourselves in order to be like other people."
"We will gradually become indifferent to what goes on in the minds of other people when we acquire a knowledge of the superficial nature of their thoughts, the narrowness of their views and of the number of their errors. Whoever attaches a lot of value to the opinions of others pays them too much honor."
"Religion is the masterpiece of the art of animal training, for it trains people as to how they shall think."
"A high degree of intellect tends to make a man unsocial."
"Hope is the confusion of the desire for a thing with its probability."