What is the evil man in biblical context?

In biblical literature, particularly as referenced in Psalm 140, the term 'evil man' encompasses both the adversaries outside the believer and the internal struggle with sin. David's prayer reflects the reality of external threats, as well as the internal battle believers face against their old sinful nature. Ephesians 4:22 admonishes believers to put off their former self, emphasizing the need for seeking deliverance from this 'old man' and the continuous mischief that arises from it. Understanding both aspects helps us to approach God earnestly for strength and salvation against all forms of evil.