Sun of righteousness with healing in his wings
Here’s what it means
God’s saving righteousness rises like the sun, bringing healing, vindication, and joy to those who fear Him.
Why the Bible says it this way
The writer uses a picture to explain one thing by describing it as another.
A helpful detail: The phrase is a clear image of dawning salvation. Christians often see messianic fulfillment, but the image itself should not be overdecoded.