Why Does The Poet Compares Himself To The Cloud In The Poem Daffodils By William Wordsworth?

He mentions at the beginning of the poem that he wanders lonely as a cloud in hte sky which keeps moving without a clear destination. Later on, you can find that he does not feel lonely anymore after he is among a beautiful fields of daffodils. Daffodils are compared as his friend, and a host who gives him a warm welcome and a valuable lesson (jocund company,  a host). Now he does not feel lonely but he is so happy with the dance of daffodils (personification is used). From the words, glance and show, you can find that the speaker's attention is attracted by the beauty of nature. Even when he is back home, lying on a sofa, he can see it with his inner mind (memory) and he says that it is valuable (the color gold instead of yellow is used to portray how valuable the show which he could not understand at first when he is in the field but perceives it later).
So, from a man who wanders without destination like a cloud over valley and hills, now he finds that nature is his friend and it is imprinted in his mind and makes him happy everytime he thinks of it.