Santa has Sack

A while ago I heard a poem, read aloud, about Santa Claus. Specifically it was in regards to a kid asking him how it was physically possible to service the world's toy needs, and Santa's explanation of the phenomonon.

Santa centered his entire defense on his sack. Santa was explaining the magical and demi-magical properties of this red bag and how this allowed him to do the shit he does.

As the poem went on, three lines caught my attention.

"The sack is joy."
"The sack is full of love."
"The sack is never empty."

I began to realize, at least on a subconsious level, that the Sack wasn't the red bag, but Santa's -- well -- Sack. His powers lied within and were a force to be reckoned with. Santa had balls of steel and if you messed with Santa, The sack would be angry.

I laughed aloud at that point and then began thinking of my own parodies like "The sack is freely giving." and so forth. I thought it would be fun to see what we could come up with.

Go ahead, describe Santa's sack.