You have to set aside any ideas you have about Satan, because they’re all a lot more recent than what the writers of the Gospels had in mind. The Aramaic word “סָטָנָא” means adversary, and really that’s all that is being intended here. Again, this is a reference to the separatists in Galilee who were opposed to Rome and thus truly evil. This character has generated far more attention than the Gospel writers could possibly have imagined, so it’s important to not overburden this word with too much meaning.