动物
The attosecond timescale is to electron motion what the high-speed camera was to studying animal locomotion.
I never saw a wild thing sorry for itself. A small bird will drop frozen dead from a bough without ever having felt sorry for itself.
All our knowledge merely helps us to die a more painful death than the animals that know nothing.
The human being is the only animal that thinks about the future.
The only thing I'm interested in is the human animal and what it's like.
The human animal is a bad animal.
Until one has loved an animal, a part of one's soul remains unawakened.