“The natural term of the affection of the human animal for its offspring is six years.”
“We risk losing what nature is if we couch its value in human terms.”
“Sometimes conceiving an affection for an animal is easier than for a human.”
“The parent who sedulously endeavors to form the heart and enlarge the understanding of his child has given that dignity to the discharge of a duty, common to the whole animal world, that only reason can give. This is the parental affection of humanity, and leaves instinctive natural affection far behind.”
“You think human nature is a beast, that it must be put in a cage. But it's the cage that makes the animal bad.”
“Animals are by nature while Humans are by thought”