Jesus came to destroy the works of the devil. (John 3:8b) His work on the cross would undo that which Satan had done in lying to our First Parents and causing them to sin against God. Jesus will open the way for men and women to come back to God by taking away their sin and paying for it on the cross. He would open a way to new life and eternal life. This Jesus did by his life, death, and resurrection. Satan had been cast out of heaven because of his rebellion against God. He is about to be cast out of this world as well. King Jesus had come to destroy his works and claim His People.
I am always worried about the hit and miss nature of Christian Education. Do we have a full understanding of what it is that Jesus has done for us? Winston Churchill, after Sandhurst, undertook a study of economics and hired a tutor so that he would not just know bits and pieces of the subject. Do you have a hit or miss knowledge of the Gospel or do you understand all the basics of it? Jesus, by His death and resurrection, is destroying the works of Satan.
Consider: Genesis 3:15