A strain of the earth's sweet being in the beginning In Eden garden – (lines 10-11)
Here we see that, as beautiful and joyous as spring is, it also serves as a reminder of what was lost when man was expelled from Eden. It also implies what will be lost, as the seasons change, and as the innocent kids grow up.
Before it cloud, Christ, lord, (line 12)
Here the poem turns into a prayer, directly addressed to Christ. It seems that the culmination of all the speaker's attention to the natural world and contemplation of Christian teachings is in a prayer, a direct communication with God.
O maid's child, thy choice and worthy the winning. (line 14)
Through this prayer, and the acknowledgment that it is God's choice, our speaker seems to return a little to the praise and triumph of the earlier lines.