"I believe that one of the most deeply human, and humane, of [the faculties of a mature human that exist in the child] 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."