For, behold, &c.— The design of the Holy Spirit in this clause seems to be, to describe the state of the nations of the world at the time when God should illuminate the church with this light, as a new advent of his Son, and a repeated manifestation of his divine kingdom. Many have thought from this passage, that almost all the world should be found in a similar state of darkness, wherein the Son of God found it at his first coming: but I hope not. I trust that vital godliness will increase, however formalism and antinomianism be overthrown and swept off the face of the earth, till the Messiah comes to reign with his ancients during the great millennium.
Related Commentaries of Isaiah 60:2
Isaiah 60:2-3
2 For, behold, the darkness shall cover the earth, and gross darkness the people: but the LORD shall arise upon thee, and his glory shall be seen upon thee.
3 And the Gentiles shall come to thy light, and kings to the brightness of thy rising.