The physician, it seems, is trying to tell his patient to trust him. Yes, the operation might be painful, but rest assured that the hurt will work for his own good.
In the same way, God allows us to experience pains and hurts in life. But these are not intended to destroy us but to make us more fruitful.
This is the reason why God does not simply give us what we ask for and instead gives us opposite. Somebody said:
I asked for health that I might do greater things;
I was given grace that I might do better things.
I asked for power that I might have the praise of men;
I was given weakness that I might feel the need of God.
I asked for all things that I might enjoy life;
I was given life that I might enjoy all things.
God’s love towards His people is not a pampering love but a perfecting love. The fact that He loves us is no guarantee that we will be sheltered from the pains of life. When Paul understood that God’s grace is made perfect in weaknesses, he gladly concludes:
10 “That is why, for Christ’s sake, I delight in weaknesses, in insults, in hardships, in persecutions, in difficulties. For when I am weak, then I am strong.” -2 Corinthians 12:10