Satan or Who?

Talk about Satan walking to and fro looking for someone to devour, when Peter was encouraging Jesus not to die, Jesus said "Get behind me, Satan! You are a hindrance to me. You are not setting your mind on the things of God, but on the things of man." Matthew recorded that Jesus was addressing Peter but Jesus calls him Satan. Was it Satan or was Jesus telling Peter that he was advancing Satan's purpose not God's purposes?

 

If Satan can personally and physically influence humans today why can't the Holy Spirit? And if they both can, how do they do it? Some believe the HS works only through the Word without considering the consequences of that belief. If the HS leads only through the word how does Satan influence people he has no word.

 

In the Garden of Eden, the HS tells us Satan tempted Eve. We are told later a serpent is punished for that action. Could it be the animals had a unique relationship with Adam and Eve and one of the serpents was just advancing Satan's purposes and not God's purposes?

 

If Satan tempts us what does James mean when he tells us we are tempted when we are lured and enticed by our own desire? Is it Satan or is it us? Was it Satan or a serpent? Was it Satan or Peter?