Daffodils, by Wordsworth

Daffodils, by Wordsworth is the presentation of the beauty of nature, the simplest and prettiest creation of god is being contemplated by him, it is important to realize that a poet just writes about what he feels and what is important for him, in this case, a bunch of flowers are the trigger for a whole new world perspective.

The stanza "A poet could not but be gay, In such a jocund company" is because this beauty is so overwhelming that he doesn’t feel alone, he is in company of the nature, as something natural and supernatural at the same time, because the idea that he presents of the flowers, the clouds and the stars. We must remember that this is a keystone in romanticism.
I personally believe that presents the idea of life, as complex as human existence, but beauty and simple as a bunch of Daffodils.