the lambs of spring are now “full grown,” and, in the final line of the poem, the swallows gather for their winter migration. The understated sense of inevitable loss in that final line makes it one of the most moving moments in all of poetry; it can be read as a simple, uncomplaining summation of the entire human condition.
Despite the coming chill of winter, the late warmth of autumn provides Keats’s speaker with ample beauty to celebrate: the cottage and its surroundings in the first stanza, the agrarian haunts of the goddess in the second, and the locales of natural creatures in the third. Keats’s speaker is able to experience these beauties in a sincere and meaningful way