Faith and obedience also prove to be interchangeable in their essence:
"And who did God say would never enter His place of rest? Weren't they the ones that 'disobeyed' Him? We see that those people did not enter the place of rest because they did not have 'faith'." (Hebrew 3:18-19)
"Without 'faith', no one can please God. Whoever goes to God must believe that God exists and that he rewards those who 'seek' Him." (Hebrews 11:6)
Consequently, nobody can please God and receive anything from Him without obedience!
"What use is it, my brothers, if a man says he has faith, but he has no works? Can that faith save him?" (James 2:14)
"Faith by itself, if it does not result in action, is dead." (James 2:17)
"Not everyone who calls me their Lord will get into the kingdom of heaven. Only the ones who obey my Father in heaven will get in." (Matthew 7:21)
Dietrich Bonhoeffer once said, "Only he who believes is obedient, and only he who is obedient believes."
Now, what does your Christian faith require that the devils can't do?