When the Sun of Righteousness rises to banish the darkness, He will have two distinct effects.
To those with an organic connection to Christ, it means warming, life-giving rays.
To those disconnected to Christ, it means their shriveling as the lifeless branches they are - making them fit only for the furnace.
Same Sun, two different effects.
To the believer it is the sunshine of eternal love. To the unbeliever it is the furnace of God's righteousness.
Therefore the whole world is summoned to find healing in Christ's wings.