Window of the soul

Look out through my window,
Tell me what you see.
A grey and misty life,
Or the tips of a tree?
Out through the darkness,
Or a world filled with light.
Every person has this window,
brimming in the twilight.
Open up your shutters
Let the sun shine in.
Pull off your bars
Let your life begin.
So many windows,
some mosaics and bold.
Some locked for ever,
Others paved in gold.