Anne Sexton - The Balance Wheel

Where I waved at the sky
And waited your love through a February sleep,
I saw birds swinging in, watched them multiply
Into a tree, weaving on a branch, cradling a keep
In the arms of April sprung from the south to occupy
This slow lap of land, like cogs of some balance wheel.
I saw them build the air, with that motion birds feel.

Where I wave at the sky
And understand love, knowing our August heat,
I see birds pulling past the dim frosted thigh
Of Autumn, unlatched from the nest, and wing-beat
For the south, making their high dots across the sky,
Like beauty spots marking a still perfect cheek.
I see them bend the air, slipping away, for what birds seek.

Anne Sexton

http://www.poemhunter.com/poem/the-balance-wheel/