"By faith the walls of Jericho fell down, after they were compassed about seven days." (Hebrews 11: 30)
Just as the faith of God lives in us because of Jesus, so too everything that we do by faith is not our effort, but rather His life living in us:
"20I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me: and the life which I now live in the flesh I live by the faith of the Son of God, who loved me, and gave himself for me. 21I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain." (Galatians 2: 20-21)
This faith is not just some visionary desire for things, but an invested acceptance in righteousness granted to us by faith:
"For therein is the righteousness of God revealed from faith to faith: as it is written, The just shall live by faith." (Romans 1: 17)
"What shall we say then? That the Gentiles, which followed not after righteousness, have attained to righteousness, even the righteousness which is of faith." (Romans 9: 30)
Faith is not some force that we exert in our lives, but rather a recognition based on God's Word of all that He has done and is doing in our lives.
Let us consider what the Israelites did in regards to the walls of Jericho:
"1Now Jericho was straitly shut up because of the children of Israel: none went out, and none came in. 2And the LORD said unto Joshua, See, I have given into thine hand Jericho, and the king thereof, and the mighty men of valour. 3And ye shall compass the city, all ye men of war, and go round about the city once. Thus shalt thou do six days. 4And seven priests shall bear before the ark seven trumpets of rams' horns: and the seventh day ye shall compass the city seven times, and the priests shall blow with the trumpets. 5And it shall come to pass, that when they make a long blast with the ram's horn, and when ye hear the sound of the trumpet, all the people shall shout with a great shout; and the wall of the city shall fall down flat, and the people shall ascend up every man straight before him." (Joshua 6: 1-5)
Notice that the LORD God spoke to Joshua: "I have given you Jericho." The Israelites did not take something that was not already given to them. Faith in action speaks to the fact that God has taken care of all our needs (Philippians 4: 19)
Yet what is the significance of the Israelites going around the city of Jericho seven times, blowing their horns with the Ark of the Covenant? Let us not derive from these actions that the blowing of horns and passing around city walls brought them down. The horns speak of the Finished Work of Jesus, as we consider the ram caught by his horn in the thicket, sacrificed in place of Isaac in Genesis 22: 13. Seven priests and seven times speak of perfection, or completeness. The long blast and the grout shout speak of Jesus shouting on the Cross "It Is Finished!" (John 19: 30)
Everything in the Bible speaks of Jesus and all that He has done for us. The more that we grow in grace of all that He has done, the more that we see the walls of bondage and difficulty falling down in our lives. When we receive the grace of God by faith, we overcome.