Why did the poet write "I Wandered Lonely as a Cloud"?

Wordsworth wanted to recapture a moment in time in 1802 when he and his sister were walking along the riverbank and saw a few daffodils.  Then the expanse of daffodils came into full view as they walked nearer to the riverbank.

If Wordsworth were an impressionistic painter, he would have painted the scene from the position of being in the sky looking down on the riverbank and the field of daffodils.

As a poet, Wordsworth attempted to recapture the moment by giving the reader a "cloud's-eye" view of the expanse of color and beauty.

I wandered lonely as a cloud
That floats on high o'er vales and hills,
When all at once I saw a crowd,
A host, of golden daffodils;
Beside the lake, beneath the trees,
Fluttering and dancing in the breeze.