Satan uses man's "flesh", the sinful nature, also in Christians if they're not walking by the Spirit. I believe Peter had fallen into pride and so he dared to take the authority to rebuke the Son of God.
@sarikorpi read Romans6,7,and8. Our flesh is dead. We have been risen with Christ. And He dwells in us
@Kruselady Yes, this is the truth about us in Christ! 🙌 When we were born again out of Spirit and water (Joh. 2:5) we became new Creations in Him, the old is gone and the new has come! (2. Kor. 5:17). The new man in Christ is free of the desires of the flesh (Gal. 5:24) so we need to start walking by the Spirit in order to be in that new. (Gal. 5.16-17, 5:25) But we have still the ability to live according to the old man, our flesh, if we want. (Gal. 3:3, 1. Kor. 3:1-3, Jaak. 4:1-3). So it becomes clear, that to walk by the Spirit is a choice, not something that happens automatically. We need to kill the deeds of the flesh and put them away (Col. 3: 5-10, Room. 8:12-13, Ef. 4:22-24). Before we were born again we did not have the ability to do this choice because we lived in darkness, but now when we live in the light we need to walk in it too. (Ef. 5:8-15).
God bless you!
@Kruselady However, it's important to understand that to walk in the Spirit and to put away the deeds of the flesh, does not happen in our own strenght and by our own ability! Everything comes from God, even the will to do what is right. We have a choice to take, but that choice is about whether we want to submit ourselves under God and His Word, or not. Whether we want to live according to our own will, or His. Whether we daily want to take up our cross and follow Him, or not. And whether we seek His Kingdom first, or the desires of our selfish nature. And it's God that fully does the work in us through His Spirit, by ourselves we can do or accomplish nothing!
@sarikorpi amen.
@sarikorpi @Kruselady Amen!
Also, if Christian's starts to do things that are a sin (for example participate in yoga, have sex outside marriage) they will open the door for Satan to come into their lives just the same way as happens with non-christians.