credit: Michelle Meiklejohn
Finally, be strong in the Lord and in his mighty power. Put on the full armor of God, so that you can take your stand against the devil’s schemes.” Ephesians 6:10-11 NIV
Satan is real. He does attack and he's good at what he does.
But the Christian is not defenseless. In fact the Christian is provided with a full armor, completely protected against any evil attacks. But this armor is useless unless it is worn. Verses 14-17 of this chapter list the various pieces of this armor - the belt of truth, the breastplace of righteousness, feet fitted with readiness, the shield of faith, the helmet of Salvation, and the sword of the Spirit.
Satan is real, but God is real too, and His power and protection is far beyond anything that Satan can throw at us. We simply need to be fitted with God's holy armor and rely on the strength He so richly supplies. There is no need for fear because we already know Jesus won the battle.