There is no end, indeed, to making books or experiments, or to travel, or to gathering wealth. Problem gives rise to problem. We may study for ever, and we are never as learned as we would. We have never made a statue worthy of our dreams. And when we have discovered a continent, or crossed a chain of mountains, it is only to find another ocean or another plain upon the farther side. In the infinite universe there is room for our swiftest diligence and to spare. It is not like the works of Carlyle, which can be read to an end. Even in a corner of it, in a private park, or in the neighbourhood of a single hamlet, the weather and the seasons keep so deftly changing that although we walk there for a lifetime there will be always something to startle and delight us.
It is in virtue of his own desires and curiosities that any man continues to exist with even patience, that he is charmed by the look of things and people, and that he wakens every morning with a renewed appetite for work and pleasure. Desire and curiosity are the two eyes through which he sees the world in the most enchanted colours: it is they that make women beautiful or fossils interesting: and the man may squander his estate and come to beggary, but if he keeps these two amulets he is still rich in the possibilities of pleasure.
To look on the happy side of nature is common, in their hours, to all created things. Some are vocal under a good influence, are pleasing whenever they are pleased, and hand on their happiness to others, as a child who, looking upon lovely things, looks lovely. Some leap to the strains with unapt foot, and make a halting figure in the universal dance. And some, like sour spectators at the play, receive the music into their hearts with an unmoved countenance, and walk like strangers through the general rejoicing. But let him feign never so carefully, there is not a man but has his pulses shaken when Pan trolls out a stave of ecstasy and sets the world a-singing.
Science writes of the world as if with the cold finger of a starfish; it is all true; but what is it when compared to the reality of which it discourses? where hearts beat high in April, and death strikes, and hills totter in the earthquake, and there is a glamour over all the objects of sight, and a thrill in all noises for the ear, and Romance herself has made her dwelling among men? So we come back to the old myth, and hear the goat-footed piper making the music which is itself the charm and terror of things; and when a glen invites our visiting footsteps, fancy that Pan leads us thither with a gracious tremolo; or when our hearts quail at the thunder of the cataract, tell ourselves that he has stamped his hoof in the nigh thicket.
The Greeks figured Pan, the god of Nature, now terribly stamping his foot, so that armies were dispersed; now by the woodside on a summer noon trolling on his pipe until he charmed the hearts of upland ploughmen. And the Greeks, in so figuring, uttered the last word of human experience. To certain smoke-dried spirits matter and motion and elastic ethers, and the hypothesis of this or that other spectacled professor, tell a speaking story; but for youth and all ductile and congenial minds, Pan is not dead, but of all the classic hierarchy alone survives in triumph; goat-footed, with a gleeful and an angry look, the type of the shaggy world: and in every wood, if you go with a spirit properly prepared, you shall hear the note of his pipe.