Write down the theme of the following poem (Not more than fifty words):

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.

Continuous as the stars that shine

And twinkle on the milky way

Along the margin of a bay.

Ten thousand saw I at a glance,

Tossing their heads in sprightly dance.