Think, for a moment, of the difference, as regards mental attitude, between the naturalist who deals with things through ideas, and the layman (so to call him) in picking up a shell on the sea-shore; what it is that the subsumption of the individual into the species, its subsequent alliance to and co-ordination with other species, really does for the furnishing of the mind of the former. The layman, though we need not suppose him inattentive, or unapt to retain impressions, is in fact still but a child; and the shell, its colours and convolution, no more than a dainty, very easily destructible toy to him. Let him become a schoolboy about it, so to speak. The toy he puts aside; his mind is [158] drilled perforce, to learn about it; and thereby is exercised, he may think, with everything except just the thing itself, as he cares for it; with other shells, with some general laws of life, and for a while it might seem that, turning away his eyes from the "vanity" of the particular, he has been made to sacrifice the concrete, the real and living product of nature, to a mere dry and abstract product of the mind. But when he comes out of school, and on the sea- shore again finds a fellow to his toy, perhaps a finer specimen of it, he may see what the service of that converse with the general has really been towards the concrete, towards what he sees--in regard to the particular thing he actually sees. By its juxtaposition and co- ordination with what is ever more and more not it, by the contrast of its very imperfection, at this point or that, with its own proper and perfect type, this concrete and particular thing has, in fact, been enriched by the whole colour and expression of the whole circumjacent world, concentrated upon, or as it were at focus in, it. By a kind of short-hand now, and as if in a single moment of vision, all that, which only a long experience, moving patiently from part to part, could exhaust, its manifold alliance with the entire world of nature, is legible upon it, as it lies there in one's hand.