Ah, happy, happy boughs! that cannot shed Your leaves, nor ever bid the Spring adieu;
And, happy melodist, unwearied,
For ever piping songs for ever new

What does the speaker say about the main topic of the passage?

He complains that happiness is hard to find.
He praises the advantages of being frozen in time.
He bemoans being stuck playing the same tune forever.
He admires the way the trees reflect the beauty of nature.