1 Now Jericho was securely shut up because of the children of Israel; none went out, and none came in. 2 And the LORD said to Joshua: “See! I have given Jericho into your hand, its king, and the mighty men of valor. 3 You shall march around the city, all you men of war; you shall go all around the city once. This you shall do six days. 4 And seven priests shall bear seven trumpets of rams’ horns before the ark. But the seventh day you shall march around the city seven times, and the priests shall blow the trumpets. 5 It shall come to pass, when they make a long blast with the ram’s horn, and when you hear the sound of the trumpet, that all the people shall shout with a great shout; then the wall of the city will fall down flat. And the people shall go up every man straight before him.” (Joshua 6:1-5)
A clearer picture of salvation “by grace…through faith” could not be given. Israel took Jericho by grace: “God has given you the city” (verse 2, 16). Yet, their faith in God had to be obedient for seven days (verses 3-5). Then, the walls would “fall down flat” (verse 5). Similarly, sinners are saved by God’s grace when, by faith, they obey Him (Mark 16:15-16; Acts 2:38-41; Titus 3:5). Obedience does not earn salvation any more than it earned Jericho. Yet without obedient faith, the gift is not received (the walls would not have fallen until Israel obeyed God). Saving faith is obedient as it relies on God’s grace for salvation.