Another prophet foretold that the returning exiles would dwell in a Jerusalem that had no walls, for I, saith the Lord, will be unto her a wall of fire round about ; and Isaiah sang, We have a strong city; salvation will God appoint for walls and bulwarks.' There is no need for material defences for the community or the individual whom God defends. Would that the Church had lived up to the height of that great thought! Would that we each believed it true in regard to our own lives! There are three ways in which this promise may be viewed. We may think of salvation' as meaning God's purpose to save. And then the comfort and sense of security will be derived from the thought that what He intends He performs, and that nothing can traverse that purpose except our own rebellious self-will. They whom God designs to keep are kept; they whom God wills to save are saved, unless they oppose His will, which opposition is in itself to be lost, and leads to ultimate and irreparable loss.
We may think of salvation as an actually begun work. Then the comfort and sense of security will be derived from that great work by which salvation has begun to be ours. The work of Christ keeps us from all danger, and no foes can make a breach in that wall, nor reach those who stand safe behind its strong towers.
We may think of salvation as a personal experience, and then the comfort and sense of security will be derived from that blessed consciousness of possessing in some measure at least the spirit, not of bondage, but of a son. The consciousness of having salvation' is our best defence against spiritual foes and our best shield against temporal calamities.
It is good for us to live by faith, to be thrown back on our unseen protector, to feel with the psalmist, Thou, Lord, makest me to dwell in safety, though alone,' and to see the wall great and high that is drawn round our defenceless tent pitched on the sands of the flat desert.