The apostle John is giving us here a revelation of what is happening in the spiritual world and it is important to remember that what we experience in this world is only a reflection of what is happening in the spiritual world. To fail to grasp this truth is to struggle with our own strength without being able to obtain any real victory. It is for this reason, for example, that Paul tells us that we do not have to struggle against flesh and blood, but against powers of darkness (cf. Ephesians 6:12). Here John reveals that there is an accuser before God who accuses us day and night.
It is so easy to feel accused, by other people who think that we are not as we should be ... Or sometimes, simply by our thoughts which remind us of our bad actions, our past or the difficulty of some of our struggles against sin. We are still in a body of flesh and the nature of sin sticks to us so closely, which makes us aware of our shortcomings. These are all the things the accuser tries to remind God of, while wanting to bombard our thoughts. However, He was defeated.
Pay no attention to his voice, listen to that loud voice that says, “Salvation has come, and the power and kingdom of our God. By His death and resurrection, Jesus erased the act written against us (cf. Colossians 2:14), He freed us from the law of sin and death (cf. Romans 8: 2). Jesus became sin, He took our sin, so that we would be justified (2 Corinthians 5:21). Our faults, our shortcomings and our sin have been erased, which means that they no longer exist, God has forgotten them (cf. Isaiah 43:25). How can you be accused of something that no longer exists? It's up to you to know which voice you're going to listen to.
An important thing to remember is that God never accuses us. When we do something wrong, the Holy Spirit comes to convict us of sin, righteousness and judgment (cf. John 16: 8). As He reveals our sin to us, He also convinces us of righteousness. This means that He reveals to us that Christ has forgiven us our sin, that in Him we are righteous and that nothing can accuse us. He has already forgiven all of our sins, past, present and future. This belief enables us to repent and receive His forgiveness and live for the benefit of His grace knowing that judgment is pronounced and the devil is condemned. In Christ there is no place for accusation, so do not allow anything or anyone to accuse you.
No one can accuse you (cf. Romans 8:33). It is therefore up to you to position yourself so as not to be accused. In the next verse it is said that the victory over the accuser is won by the blood of the Lamb and the word of our testimony. Jesus gave himself on the cross, it is done, it is now up to us to open our mouths to gain victory by the word of our testimony. That is, to declare aloud - this is important, because the devil does not hear what the followers of Christ think - that our sins are forgiven, that we are righteous and free in Christ. You can take the end of Romans 8, memorize it and declare it.
You are His child, walk in His freedom and share this Good News around you, for others to break the power of the accusation over their lives.
God has blessed you richly so that you bless abundantly ...