My Greatest Treasure

What is something you can show, but cannot see?
What is something you have seen, but have never seen before?
I wish for friends that can count on me no matter what
Broken skin atop calloused knuckles
Like a tattered blanket
I will keep you warm
And protect you from those fiends
There is an ancient strength stirring within me
My mind's eye sees that it is boiling over
And those fiends are going to see it too