Enishi quotes from Rurouni Kenshin

Suffer, Battousai. Your suffering is my only joy.

There is no defense! There is no need for defense! You have already robbed me of the only thing I ever wanted to protect!

I'm counting on you, Kujiranami-san. With your new right arm [a cannon], ignite the fire that signals the beginning of revenge.

Now, here is the question: Stealing from the family would have been enough. Why did the child massacre them? Answer 1: The family resisted. Answer 2: The child was a psychopath. Answer 3: For the child, whose sister was killed by a merciless hitokiri, destroying his happiness... the sight of a family living in happiness was unbearable. The correct answer... is, without debate, number three.