What does the Bible teach about the influence of Satan on unconverted individuals?

Satan is depicted as a strong man in Scripture, effectively holding unconverted souls in a state of false security. His primary aim is to provide a counterfeit peace that reassures the unregenerate of their standing, contrary to the reality of their separation from God due to their sins. The unclean spirit's return to a previously cleansed individual signifies the danger of having an outwardly moral life while being devoid of true spiritual rebirth. The only escape from this deception is through the stronger man, Christ, who invades the hearts of the condemned and brings salvation, enabling believers to resist the power of Satan and live in freedom.