In this lesson on life, we want to see Satan's plot to spoil man.
Satan is God's adversary. Matthew 13:28a is nearly the only verse in the New Testament which tells us that Satan is God's enemy. In Matthew 13:28 the word enemy is used, but we have to realize that Satan is not only God's enemy but also God's adversary. This is because he is within the circle where God is (Job 1:6). The name Satan, from Hebrew, means adversary. He was and still is not only an enemy from outside but also an adversary from inside. We have to point out that in the universe God has an enemy and even an adversary within His kingdom.
Genesis 3:1 shows that Satan hid himself in the subtle serpent. For this point we can also use 2 Corinthians 11:3 and Revelation 12:9. Satan is always hiding himself in some thing, in some matter, or even in some person. In Matthew 16 Satan was hiding himself in Peter, so the Lord Jesus even called Peter, "Satan" (v. 23). When Satan first came to man, he was hiding himself in a serpent. Because Satan was hiding himself in the serpent, eventually his name is called the ancient serpent in Revelation 12:9.