לרפואת עדינה בת שבע בת נעכא גיטל
A man is walking down the street and all of the sudden - BANG - he gets hit on the shoulder.
He turns around and it's his best friend. He was actually looking for him because his friend owes him 20K that he desperately needs.
The pain is immediately transformed into joy.
Those are our יסורין in this world. It is Hashem banging us on the shoulder כביכול.
As Rav Hutner insightfully remarked - הכוני פצעוני [I was hit and injured] is a pasuk in שיר השירים, the love song between the Jews and Hashem.
We must rejoice in our struggles!