How do we know the Holy Spirit is at work in us?

The work of the Holy Spirit is evident in a believer's life through the transformation that occurs as a result of regeneration. When we are born again, we receive a new nature that desires to live for Christ and produce spiritual fruit mentioned in Galatians 5. These fruits include love, joy, peace, and self-control, which are not products of our own abilities but are gifts of the Holy Spirit. As we grow in grace and intimacy with Christ, we become more aware of our own sinfulness and God's holiness, leading to a deeper reliance on the Spirit for strength to walk in obedience.