Jesus gave a parable about His power being greater than Satan’s power:
(NASB) Luke 11:21-22 “When a strong man, fully armed, guards his own house, his possessions are undisturbed.
22 ‘But when someone stronger than he attacks him and overpowers him, he takes away from him all his armor on which he had relied and distributes his plunder.”

The strong man in this story depicts Satan.  Satan is powerful but not all-powerful.  Satan is fully armed and does guard what are his possessions.

The stronger man is Christ Jesus.  It is Jesus Who overpowered and won over Satan.  He attacked Satan when He died on the cross and when He rose from the dead three days later.

Think about this, Jesus attacked and won more at the cross than just defeating Satan.  He also defeated death (proof: He returned from death with a physical body).  He also defeated sin…because He was the sinless sacrifice God the Father accepted.  (This is why you need Jesus as your Savior…there is no one else who has died for you and taken your punishment for your sins…only Jesus has done this.)  It is only through faith in Jesus that anyone can be saved.  How can you know this is so?  Because God’s word says so!  Romans 10:9-10)

Jesus has overpowered Satan, death and sin.

When Jesus died for you…He demonstrated His power!