What is the role of the devil in a believer's life?

In the life of a believer, the devil operates primarily as an accuser and adversary, attempting to deter us from faith and trust in God's promises. As mentioned in 1 Peter 5:8, he is described as a roaring lion, seeking whom he may devour, highlighting his active role in tempting and distressing the faithful. Moreover, he stands before God, accusing us of our sins, as seen in passages like Revelation 12:10. However, it is crucial for believers to understand that while Satan seeks to undermine our security and peace, he is ultimately limited by God's sovereignty and cannot destroy those who are redeemed by Christ's sacrifice.