“God’s Spirit who is in you, is greater than the devil, who is in the world.” 1 Jn. 4:4
Satan has no power except that which God gives him. Period! That alone could be the whole devotional.
“Do not be afraid of what you are about to suffer. I tell you the devil will put some of you in prison to test you, and you will suffer for ten days. But be faithful, even if you have to die, and I will give you the crown of life.” Rev. 2:10
Those are our Lord’s words to the church in Smyrna. Look at what He said. He says there will be persecution, and it will last for ten days. You will go through the persecution as a testing of your faith. But the outcome, if you are faithful, is the crown of life. In other words, Jesus uses Satan to fortify His church, to strengthen you.
So even when it looks like Satan is winning, he loses. Greater is He that is in you, than he that is in the world!