It will never be enough, never, no matter how much Claude teaches them, how hard he tries. They fall, in the end, or sacrifice themselves--which is maybe the same thing.
The boy doesn't understand this, doesn't realize that Claude won't always be there, won't always be watching over him, teaching, guiding. He won't always be there to correct, to lead. And he won't always be there at night when the training's done, won't be there to touch and caress, won't be there to love.
The empath just accepts the training and the touches and the love, never thinking (maybe never letting himself think) that one day it will end.
Claude won't always be there because he will fall, in the end, or he'll sacrifice himself--which is maybe the same thing. He will, or Peter will, and it will all be for nothing.
And no matter how much he teaches him, how hard he tries, it will never, ever be enough.
