What does the Bible say about enemies of the believer?

The Scriptures highlight the reality of enemies that believers encounter, as emphasized in Psalm 17. David describes these adversaries as strong and arrogant, seeking to oppress and bring down the people of God. Notably, these enemies can be human, as seen in David's conflicts with figures like Saul and Goliath, but they also include spiritual enemies, particularly Satan, who is likened to a roaring lion seeking someone to devour (1 Peter 5:8). The acknowledgment of these adversaries serves to prepare believers for the trials they will face in their walk of faith.