A FRIEND CALLED.......PAIN

MY FRIEND IS A TEACHER,
AND HE TEACHES WITH THE VENOM OF A CONVICTED PREACHER.
WE'VE BEEN FRIENDS SINCE BIRTH,
HE'S A MESSENGER, ON ASSIGNMENT ON THE EARTH.
SENT TO CORRECT THE SON'S OF MEN, 
AND TO DETOUR THEM FROM PATHS THAT LEAD TO DEATH.
I HATE MY FRIEND WITH A PASSION, 
COS EVERYTIME HE COMES AROUND I FEEL UNCOMFORTABLE.
HE CLAIMS HE COMES TO HELP,
BUT HIS MOTIVES ARE SOMETIMES QUESTIONABLE.
MY FRIEND MAKES ME CRY,
HE MAKES ME SCREAM UNTIL MY VOICE IS HEARD ON HIGH,
HE MAKES ME GRIEVE,AND SOMETIMES WISH ICOULD DIE.
I PRAY HE WOULD LEAVE AND NEVER RETURN,
BUT HIS QUITE PERSISTENT.
AGAIN AND AGAIN HE KEEPS COMING,
AND HE NEVER STOPS UNTIL THE LESSON IS LEARNT.
BUT AS I GRROW OLDER, I HAVE COME TO APPRECIATE HIM,
THOUGH SOME SAY, HIS AN ENEMY TO BE AVOIDED,
A CONSEQUENCE OF SIN.
MY FRIEND COULD BE VERY BRUTAL, YES I AGREE,
BUT I'VE COME TO KNOW,THAT IF I MUST SUCCEED,
THEN I MUST PAY CLOSE ATTENTION, WHEN HE COMES TO ME.
DO WE NEED HIM OR NOT?HIS HE GOOD OR BAD?
YOU BE THE JUDGE;
WHO INFORMS US WHEN OUR HEALTH IS FAILING,
AND NEEDS TO BE EXAMINED OR ELSE?....
WHO INSTRUCTS US THAT WE NEED DIVINE HELP
AND CANT MAKE IT ALL BY OURSELVES?
WHO MOTIVATES US AND MAKES US DESIRE CHANGE?
IF YOU CAN ANSWER THIS QUESTIONS,
THEN I GUESS YOU ARE READY TO EMBRACE MY FRIEND CALLED PAIN.