The devil used to be a serious worshipper but he was kicked out of heaven because of his pride. So the moment I open my mouth to praise God, I remind the devil that he no longer has that job of being a worshipper. The moment the devil was kicked out, the seat became vacant.
The Bible says, the spirit of God is running to and fro seeking for those who will worship Him in spirit and in truth. Every time you go on your knees to worship God, you remind the devil that you took his job.