Rahab depended for her preservation upon the promise of the spies, whom she regarded as the representatives of the God of Israel. Her faith was simple and firm, but it was very obedient. To tie the scarlet cord in the window was a very trivial act in itself, but she dared not run the risk of omitting it.
Come, my soul, is there not here a lesson for you? Have you been attentive to all your Lord's will, even though some of His commands should seem nonessential? Have you observed in His own way the two ordinances of believers' baptism and the Lord's Supper? To neglect these is to display the unloving disobedience in your heart. From now on be blameless in everything, even the tying of a thread, if that is what's commanded.
This act of Rahab provides an even more solemn lesson. Have I implicitly trusted in the precious blood of Jesus? Have I tied the scarlet cord, with an intricate knot in my window, so that my trust can never be removed? Or can I look out toward the Dead Sea of my sins or the Jerusalem of my hopes without seeing the blood and seeing all things in connection with its blessed power?
The passer-by can see a cord of such a conspicuous color if it hangs from the window: It will be good for me if my life makes the efficacy of the atonement conspicuous to all onlookers. What is there to be ashamed of? Let men or devils gaze if they want, the blood is my boast and my song.
My soul, there is One who will see that scarlet cord, even when because your faith is weak you cannot see it yourself; Jehovah, the Avenger, will see it and pass over you. Jericho's walls fell flat: Rahab's house was on the wall, and yet it stood undisturbed. My nature is built into the wall of humanity, and yet when destruction smites the race, I will be secure. My soul, tie the scarlet cord in the window again, and rest in peace.