Get out the microscope, because we’re going through this poem line-by-line.
Lines 56-57
Sound of vernal showers
On the twinkling grass,
- We get more lovely images from nature here. The rains of spring ("vernal showers") make a pleasant sound on the "twinkling grass."
- Notice how alive and exciting nature is in this poem. The grass can't just hang out and be grass (bor-ing). Nope. It has to be "twinkling" too.
Line 58
Rain-awaken'd flowers,
- This is another pretty nature image: flowers waking up in the rain.
- There's a little subtle personification here, since flowers don't actually sleep. But again, the vibrancy of the natural world comes through.
Lines 59-60
All that ever was
Joyous, and clear, and fresh, thy music doth surpass.
- At last! Here's the payoff for all those comparisons with other things in nature.
- Basically, the song of the skylark is better than all that other stuff. Every last bit of it. So, all those similes? Yeah, they kind of fall short.
- There are plenty of joyous things in nature—glow-worms and flowers and raindrops, etc.—but the music of the lark goes beyond ("surpasses") it all.