Satan will use our own scripture against us if we allow him, and he will plant seeds of confusion and doubt every step of the way. He wants us dead, or so destroyed that we can do nothing for the Kingdom, and His main target is our faith. He will tempt us into sin to drive a wedge between us and Jesus, but if he could manage to defeat our witness, he would. He will tell us lies about salvation, lies about scripture, lies about what is sin, lies about God, lies about the Holy Spirit, lies about the Holy Trinity, lies about the early Apostles, lies about the KJV translations - anything that could rattle our faith and cause us to doubt.
Satan will send friends, family members, strangers - anyone he can under his authority, and that is most. He will pull out all the stops if we allow him, he will send a discourager, a tempter, a seductress, and distractor, a betrayer, a mocker, a confuser, and an intimidator. He does not play fair, and he is the most subtle of the beasts.
Satan will dig up your past all day and throw it back at you, he will try to entangle you in sin so that you cannot break free. He will find the weak part in your armor and shoot flaming arrows into it. He will dig into open emotional wounds. Anything Satan and his devils can do against you and your relationship with Jesus, he will do.
1 Peter 5:8 KJV — Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour:
Revelation 12:10 KJV — And I heard a loud voice saying in heaven, Now is come salvation, and strength, and the kingdom of our God, and the power of his Christ: for the accuser of our brethren (Satan) is cast down, which accused them before our God day and night.