Of course, the poetry we see in nature is due to the emotion the spectacle produces in us; the life of nature might be as romantic and sublime as it chose, it would be dust and ashes to us if there were nothing sublime and romantic in ourselves to be stirred by it to sympathy. But our emotion may be ingenuous; it may be concerned with what nature really is and does, has been and will do for ever. It need not arise from a selfish preoccupation with what these immense realities involve for our own persons or may be used to suggest to our self-indulgent fancy. No, the poetry of nature may be discerned merely by the power of intuition which it awakens and the understanding which it employs. These faculties, more, I should say, than our moodiness or stuffy dreams, draw taut the strings of the soul, and bring out her full vitality and music. Naturalism is a philosophy of observation, and of an imagination that extends the observable; all the sights and sounds of nature enter into it, and lend it their directness, pungency, and coercive stress. At the same time, naturalism is an intellectual philosophy; it divines substance behind appearance, continuity behind change, law behind fortune. It therefore attaches all those sights and sounds to a hidden background that connects and explains them. So understood, nature has depth as well as surface, force and necessity as well as sensuous variety. Before the sublimity of this insight, all forms of the pathetic fallacy seem cheap and artificial. Mythology, that to a childish mind is the only possible poetry, sounds like bad rhetoric in comparison. The naturalistic poet abandons fairy land, because he has discovered nature, history, the actual passions of man. His imagination has reached maturity; its pleasure is to dominate, not to play. Poetic dominion over things as they are is seen best in Shakespeare for the ways of men, and in Lucretius for the ways of nature. Unapproachably vivid, relentless, direct in detail, he is unflinchingly grand and serious in his grouping of the facts. It is the truth that absorbs him and carries him along. He wishes us to be convinced and sobered by the fact, by the overwhelming evidence of thing after thing, raining down upon us, all bearing witness with one voice to the nature of the world.