When you don't understand, instead of trying to manipulate the situation to get the result you want, begin to thank God for things in your life that are good.
I read the above verse and I don't understand. God tells us to heal but we don't have the power to heal. And when we pray often our prayers for healing aren't answered as we ask them to be. Even if you are filled with belief sometimes the healing only comes after death.
And I don't understand that.
But what I do understand is that I don't see the whole picture. I can't. God sees into everyone's heart. God understands what people need. God knows what will change people. God knows the past and the future and what is happening right now. We can't begin to grasp it all.
As we look at the unknown, as we live with the unknown, we can choose gratefulness. This is the better option.