"Two Boxes"

I have in my hands two boxes 
Which God gave me to hold 
He said,"Put all your sorrows in the black, 
And all your joys in the gold." 
I heeded his words, and in the two boxes 
Both my joys and sorrows I store 
But though the gold became heavier each day 
The black was as light as before. 
With curiosity, I opened the black box 
I wanted to find out why 
And I saw, in the base of the box, a hole 
Which my sorrows stored had fallen out. 
I showed the hole to God, and mused aloud, 
"I wonder where my sorrows could be." 
He smiled a gentle smile at me. 
"My child, they're all here with me." 
I asked,"God, why give me the boxes, 
why the gold, and the black with the hole?" 
"My child, the gold is for you to count your
blessings, the black is for you to let go."