這種人很可怕，因為不到最後一刻别人都看不出来。

Yet this quality might be more common in humanity than people realize. 

Someone I know owns a very cute little dog. He had some reading experience with Buddhism, and he once said, according to Buddhist ideas, dogs are animals with lots of illusions...

I replied immediately:  Definitely, a dog believes he is "loved" by his human master, yet in reality his human master separates him from his own kind, and makes him a "pet". This is the most brutal thing in the world done on him...

Hearing my opinion, as a dog owner, he probably felt a little ironic and a little embarrassed.