It is psychologically justifiable that a subjective connection should be set up between our states of mind for the time being and phenomena; that we should perceive in the external world a reflection of our moods. If the external world shows a well-marked emotional character, it awakens in us the mood corresponding to it; and conversely, if we are under the influence of some pronounced feeling, we notice, in accordance with the mechanism of attention, only those features of nature which are in harmony with our mood, which intensify and sustain it, while the opposing phenomena we neither observe nor even perceive. A gloomy ravine overhung by a cloudy sky makes us sad. This is one form of associating our humour with the outer world. But if we from any cause are already sad, we find some corresponding sadness in all the scenes around us--in the streets of the metropolis ragged, starved-looking children, thin, miserably kept cab-horses, a blind beggar-woman; in the woods withered, mouldering leaves, poisonous fungi, slimy slugs, etc. If we are joyous, we see just the same objects, but take no notice of them, perceiving only beside them, in the street, a wedding procession, a fresh young maiden with a basket of cherries on her arm, gaily-coloured placards, a funny fat man with his hat on the back of his head; in the woods, birds flitting by, dancing butterflies, little white anemones, etc. Here we have the other form of that association. The poet has a perfect right to make use of both these forms. If Heine sings: ‘Es ragt ins Meer der Runenstein, Da sitz ich mit meinen Träumen; Es pfeift der Wind, die Möwen schrein, Die Wellen, die wandern und schäumen. ‘Ich habe geliebt manch schönes Kind Und manchen guten Gesellen-- Wo sind sie hin?--Es pfeift der Wind, Es schäumen und wandern die Wellen,’[102] he brings his own mournful, melancholy frame of mind with him. He bemoans the fleetingness of man’s life, the impermanence of the feelings, the shadowy passing by and away of beloved companions. In this state he looks out over the sea from the shore where he sits, and perceives only those objects that are in keeping with his humour and give it embodiment: the driving gust of wind, the hurrying gulls, now seen, now lost to sight, the rolling in and trackless ebbing of the surf. These features of an ocean scene become symbols of what is passing through the poet’s mind, and this symbolism is sound and founded on the laws of thought.