The serpent in the Garden of Eden was the Devil. The Hebrew word for the serpent is nachash. Nachash means an enchanter or whisperer.
A whisperer tells you wrong things to think, say or do. The worst thing about them is that they make you think that what they tell you is right. They are satan's friends. Truth makes them go away. When a whisperer tells you something, tell the truth. For example: Your friend steals candy at the store and you want a chocolate bar really badly! The TRUTH is - Your friend is breaking God's commandment, "Thou shalt not steal." It is wrong and when your friend gets caught, they will get in trouble. If they don't get caught, God already knows what they did, and they ARE in trouble. Whisperers are very strong. They have a lot of power because people don't use truth to fight them enough.
Satan is the devil. He has other names too. He once was an angel, but he was so jealous of God, that he became the WORST thing in the universe. He wants to be God, but nobody can be that good, so he tries to win people's souls by tricking them into doing bad things. He is the prince of liars. That means he lies all the time, and nobody lies more or better than he does. He wants you to think bad is good. He has a lot of costumes, so you might not know when it is him trying to trick you. But, if you always do good and do the right thing, he cannot win your soul. He doesn't like to lose. If you ever don't know, whether something is good or bad . . . ask God! People who believe in God, Jesus, and the Holy Spirit, and obey, will go to heaven forever, and people who believe that satan is good, will go to the lake of fire forever.
Satan is not the only problem. He has children. The Devil's children are always at work in the family business. Their purpose is to pull God's people out of The Way of Yahweh. They want everybody to sin and be bad.
The Devil's children are descendants of Cain and are called Canaanites, and they are also children of Esau, Jacob's brother. Esau's chilren are called Edomites. These children of Cain and of Esau are called Jews today. The “churches” say that these Jews are God's people, but they are really the Devil's people. This is part of the lies and deception that we are warned about.
Jesus was not fooled. He even called them what they really are.
John 8:44 Ye are of your father the devil, and the lusts of your father ye will do. He was a murderer from the beginning, and abode not in the truth, because there is no truth in him. When he speaketh a lie, he speaketh of his own: for he is a liar, and the father of it.
Guess who was the first murderer? Cain.
Esau also hated his brother Jacob and wanted to kill him.
The purpose of Jacob and his children is to build the kingdom of Yahweh.
The purpose of the children of the Devil is to destroy the kingdom.
When you study scripture and ask Yahweh to show you His truths, He will.