In this verse, the light of the Lord stands for God’s blessings, His Presence, and His revelation. For the Lord is the light shining in the darkness. (John 1:5) But it’s our decision whether we walk in the light or exchange it for the darkness of the world. Isaiah’s message to us today is that if we walk in the Lord’s way rather than the way of the world, His light and truth will illuminate our path and we will be blessed in our obedience.