You just have to have the incentive to mean it. I'm sorry I gave it to you, though.
[As established, he doesn't particularly like causing others pain. But if he's going to teach Frisk these curses, he's going to do it correctly. A half-hearted curse is still a curse, but it can go wrong. More wrong than something that's unforgivable in the first place, somehow.]
no subject
You just have to have the incentive to mean it. I'm sorry I gave it to you, though.
[As established, he doesn't particularly like causing others pain. But if he's going to teach Frisk these curses, he's going to do it correctly. A half-hearted curse is still a curse, but it can go wrong. More wrong than something that's unforgivable in the first place, somehow.]