Light And Dark

You must know the dark to know the light. 
You must know the sweet to mark the sour. 
You must know how to feel nothing to truly know the rapture of passion. 
You must know invalidity to know health. 
You must know war to know peace. 

You must know light to know dark, my friends.
For at the moment when your life does end
What colors that your days have  made
Shall be told in the contrast you bade

The sweet from the sour
The rich from the poor
The lonely hallway echoes
Someone knocking at your door

And who could it be 
A foe or a friend
For both are quite useful
When your life will one day end

So keep your eyes open, my friends
As the sun cross the sky
And know that changing of the light
​Shall pass us all, by the by..