W. is interested not in the natural world but in the relationship between the natural world and the men; in fact one of the most consistent concepts in W. is the idea that man and nature are inseparable; man is an acti participant in the natural world, so nature is considered by the author as a guide to the spiritual and moral life of man.
W. describes the forms, shapes and colours of natural objects, but abo all, he speaks about the inner force that permeates the natural world. This force allows to the man to ha a delopment in the molar sphere and in the religious sphere too; the delopment of the mind correspond to the three ages of the man: childhood, youth and adulthood; in fact W. was most interested in the growth of his relationship with nature. During childhood the relationship between man and nature is characterised by joy and rapture of senses for the child in front of nature; in the youth the relationship with nature is founded on a physical experience associated with a little bit of rationality; in the adulthood there is a moral intensity too, because adult experience is mediated through mind and no more tough senses and instincts.
W. thinks that childhood is the most important stage in man's life, because the child's emotions are retained in the memory: memory is the major force in the process of growth and it is essential for poetic creation too, because for W. the poetry is an "emotion recollected in tranquillity", so the poet ha the emotions and the feelings (in front of nature), than he remembers his emotions (there is the recollection of the emotions) and, at the end, he writes the poem.