I first heard this poem from a radio message by Ravi Zacharias titled "Is There Not a Cost?" I was so encouraged and scared at the same time that I searched for it in the web. I repost it here for I know it will help a lot of suffering Christians undergoing various trials.
When God Wants to Drill a Man
When God wants to drill a man,
And thrill a man,
And skill a man
When God wants to mold a man
To play the noblest part;