"We have enslaved the rest of the animal creation, and have treated our distant cousins in fur and feathers so badly that beyond doubt, if they were able to formulate a religion, they would depict the Devil in human form."

“Events in the past may be roughly divided into those which probably never happened and those which do not matter. This is what makes the trade of historian so attractive.”

“The old civilisation, with all the brilliant qualities which make many moderns regret its destruction, rested on too narrow a base. The woman and the slave were left out, the woman especially by the Greeks, and the slave by the Romans.”

“Looking back, I think I can separate the years when I was happy and those when I was unhappy. But perhaps at the time I should have judged differently.”

“There are two kinds of fools: one says, "This is old, therefore it is good"; the other says, "This is new, therefore it is better.”

“It is useless for the sheep to pass resolutions in favour of vegetarianism while the wolf remains of a different opinion.”

“The fruit of the tree of knowledge, always drives man from some paradise or other.”