Vash blinks at the first part, then can't help a small laugh, rubbing the back of his head. "I guess you're also right." Even if he knows that Knives knows what he meant. But then the amusement fades. "It's never enough. No matter how much I change, and improve, and accept, there is always... something too big for me to handle. Something that nobody can fight against."

At least that is not resentment against Knives, in Vash's quiet voice. Just resignation and also pain that really does not fit being described as. Young.

Then he shrugs it off, focusing on the teaching. "Doctor Conrad... I don't think he would be willing to teach me much of anything." He doesn't know the man, but from what he has seen, he seems rather. Dedicated to Knives's cause.

And Vash blinks, because. Now? Here? Really? And yes, he can admit that he's more than a little scared, given that the first and last time he used his powers, well.

But Knives pointed out that the consequences of not learning about his powers are, or can be, far worse. Still. Give him a moment.

... no, he still shudders first. Then takes a deep breath. Fear never is a good advisor, in his experience. Nobody's fear. So he does need to try.

"Small... black holes, huh? ... how small is small?