AT THE WINDOW
I sit and glance as the seasons pass,
At the window.
I look at the shadows from the past,
And remember.
I sit and think as the friends pass by,
By my window.
I remember the smile, the joke, the lie,
All past now.
I sit and wonder at the birds above,
Through the window.
I watch the flight of the wheeling dove,
Free to fly whereso’er she will.
All life must pass my window,
Whether I see it or not.
All life must pass below,
My Window.
This is lovely!! I love the idea of the revisiting of old memories being expressed as a window ( 
I think thats what you're trying to say) and the person sitting behind it watching their life flicker by. I can't find anything technically wrong with it. It's very appealing! Keep up the good work!!