Gintoki and Takasugi in “Unfinished Business”

So, this was all your doing, Takasugi.

My doing? Don't make me laugh. I just saw what he wanted and offered a hand. I know of his suffering. After all, the dark beast of revenge lies within me too. "Let's avenge our comrades!", "let's give the enemy a taste of our suffering!", "let's kill them!", "let's kill 'em all!"... These words keep ringing in my ears, nonstop. Can you hear them, Gintoki? ...No. I'm sure you can't. Someone like you, who left it all behind due to blissful indifference, could never understand it.

Takasugi, if you underestimate me, then you're in trouble. I, too, am breeding a beast.

[thinking] I... can't move...

Not a dark one, but a white one. And its name... is Sadaharu! [throws a punch]