When Jesus told his disciples that he must go unto Jerusalem, despite the danger that he might be killed, his disciple Simon Barjona, who he had nicknamed Cephas (or Peter), meaning “the stone”, tried to dissuade him from going so that this wouldn’t happen. Jesus said to Peter:
Get out of my sight, Satan. You are an offence to me, for you do not savour the things of God, but only those that are of men.
This shows clearly that Jesus thought of Satan as an embodiment of the desires of the body, and considered them to be a corrupting influence on the spirit. Jesus then said to his disciples (paraphrasing):
If anyone wishes to come after me, let him deny himself and follow me. Whoever clings to life in the flesh shall lose it, and whoever gives up his life to follow my teaching shall find true life. How does one profit if he gains the entire world, but loses his own soul? What should one give in exchange for his soul? When the kingdom of heaven arrives, everyone shall be rewarded according to his works.
Image By Ary Scheffer – Public Domain