[He wasn't looking to be thanked, but it always makes him feel a little bit warmer when someone appreciates his encouragement. He grins in response, genuinely pleased.]

Then I'll say it as often as it needs to be said. You're welcome!

[Whoa, whoa, Gohan has ideas for how he can achieve his goal? The older man suddenly has his full attention.]

You can do that? I mean, I'm not a good enough smith to reforge my swords, but you can put your own energy inside of a weapon? You don't know how, do you?

[See, Vegeta does care. <3]