Righteousness shall go before him - Shall anticipate his coming, and prepare his way. The idea seems to be, that in order to his appearing, there would be a proclamation of righteousness, and a preparation for his advent by the diffusion of righteousness among the people; in other words, the nation, in the prospect of his coming, would turn from sin, and would seek to be prepared for his appearing. Thus John proclaimed the coining of the Redeemer, “Repent ye, for the kingdom of heaven is at hand.” Matthew 3:2. So also “The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.” Matthew 3:3.
And shall set us in the way of his steps - This might be rendered, “and set its steps for a way;” that is, the steps which would be taken by him would indicate the way in which his people should walk. Perhaps, however, the common interpretation best expresses the sense of the passage. According to that, the idea is, that the effect of his coming would be to dispose people to walk in the way of the steps which he took; to be his imitators and followers. The general thought is, that his coming would have the effect of turning the people to the paths of righteousness and truth. This is the designed effect of all the visitations of God to our world.