Analysis of Lines

THOU camest with the coming Spring!
With swallows, and the murmuring
Of unloosed waters, with the birth
Of daisies dimpling the green earth.

And when the perfect rose of June
Responded to the golden noon,
My heart's deep core, suffused with bliss,
Broke into flower beneath thy kiss.

But now the swallows seaward fly,
The winds in chorus wail, 'Good-bye!'
The dead leaves whirl, and like a leaf
My heart shakes on the gusts of grief.

And yet awhile earth's flowerless breast
In lethal folds of snow will rest;
On thee too heart, with all thy woe,
Death falls one day like falling snow.