For God has not called us for impurity, but in holiness. Therefore whoever disregards this, disregards not man but God, who gives his Holy Spirit to you. (1 Thessalonians 4:7-8 ESV)
Disciples of Jesus are called to be holy, set apart for God and his will. The Christian life is a difficult one because the world is influenced by forces that oppose God and have marked the saints as targets. We are to be aware of the spiritual battle but not be overly concerned with Satan and his schemes. Otherwise, we become obsessed with the wrong things and risk not taking ownership for our own mistakes.
It becomes too easy for us to just blame the devil than admit our own faults. Yes, he is a liar and a tempter, but at the end of the day, we are the sinners. We are to walk with the Holy Spirit who serves as our Counselor and brings to memory Scripture that helps us discern right from wrong. When we make choices that please God, then we can be sure that we are doing the right thing.
Holiness is never achieved by our own power because we will continue to sin; we must lean on God for his help. Our goal is to sin less often and to keep repenting so that we are no longer enslaved to it. Have you ever felt a godly sorrow and determined to do better the next day? That’s the fire of the Holy Spirit living in you, convicting and convincing you to change your behavior for the better. When apathy settles in, then we are to be pitied because we have strayed far away from God. To counteract that, we can ask the Lord to keep burning his impression into our very souls so that our character resembles that of Jesus. God will not fault us for trying because his grace is plentiful and sufficient, and he is always ready to forgive.