„I believe that maturity is not an outgrowing, but a growing up: that an adult is not a dead child, but a child who survived. I believe that all the best faculties of a mature human being exist in the child, and that if these faculties are encouraged in youth they will act well and wisely in the adult, but that if they are repressed and denied in the child they will stunt and cripple the adult personality. And finally, I believe that one of the most deeply human, and humane, of these faculties is the power of imagination: so that it is our pleasant duty … to encourage that faculty of imagination in our children, to encourage it to grow freely, to flourish like the green bay tree, by giving it the best, absolutely the best and purest, nourishment that it can absorb.“
And never under any circumstances, to squelch it, or sneer at it, or imply that it is childish, or unmanly, or untrue.
"Why Are Americans Afraid of Dragons?" https://books.google.com/books?id=ksOjjuy3issC&pg=PA44, in The Language of the Night (1979), p. 44