How we cite our quotes: (Book.Chapter.Paragraph.)
Quote #7
"[T]he important thing, will to be to catch them young. The old knights, the ones we are fighting against, will be mostly too old to learn. I think we shall be able to get them in, and keep them fighting the right way, but they will be inclined to stick to the old habits, like Sir Bruce. […] That is why I say we must catch them young. We must breed up a new generation of chivalry for the future." (Q.8.7)
Arthur believes the children are the future. He's got to get them young and raise them up in the new ways. Old knights like Sir Bruce? Wasted effort, because you can't teach an old dog new tricks.
Quote #8
His teacher had educated him as the child is educated in the womb, where it lives the history of man from fish to mammal—and, like the child in the womb, he had been protected with love meanwhile. (K.15.8)
Another reference to evolution, this time to the specific principle of "recapitulation," or "ontogeny recapitulates phylogeny" (which has since been disproven). Anyway, the main point here is that Merlyn has educated Arthur through the various stages of evolution, but at the same time Arthur had a loving upbringing (compared to some of the other characters, like the Gawains and Lancelot).