What is the good work God does in believers?

The good work that God initiates in believers is multifaceted. According to Philippians 1:6, God who began this good work in us will continue it until the day of Christ Jesus. This includes the work of regeneration, wherein the Holy Spirit gives life to the spiritually dead, as described in Ephesians 2:1. Additionally, it involves the sanctification process, where God molds us into the image of Christ, imparting faith and good works that flow from our relationship with Him. Ultimately, it is God who empowers us to live lives that reflect His glory.