This is my favourite psalm in the bible because it talks about God's amazing protection for those that fear him. It is so powerful that satan had to steal a verse from it.(Psalms 91:11) to tempt Jesus. He told him to throw himself from a cliff since it is written God will put his angels in charge over you,they will bear you with their hands lest you dash your foot on a stone.The devil will wrongly interprete the bible to mislead many. Jesus replies, "It is written you shall not tempt the lord your God." The only way to overcome satan is by the speaking the written word. Jesus had the power to call upon fire from heaven to destroy satan just like Elijah did to the army of the fifties that attacked him thrice but he shows us the power of the word of God in overcoming temptation. They overcame him by the blood of the lamb and by the word of their testimony.(Reveletion 12:11). Psalms 19:7 says the testimony of the lord is sure making the simple wise. It is the word of God that will be your shield and buckler against the evil arrows of the devil.