John Wesley on Isaiah 58:8

Thy light - Happiness and prosperity. Break forth - It shall not only appear, but break forth, dart itself forth, notwithstanding all difficulties, as the sun breaks, and pierces through a cloud. Thy health - Another metaphor to express the same thing. Righteousness - The reward of thy righteousness. Before thee - As the morning - star goes before the sun. The glory - His glorious power and providence. Thy rereward - Thus the angel of his presence secured the Israelites when they came up out of Egypt.