How do we know the fruit of the Spirit is evidence of salvation?

The presence of the fruit of the Spirit in a believer's life, as described in Galatians 5:22-23, indicates that they have been transformed by the Holy Spirit. These attributes—such as love, joy, and peace—are not the believer's works but the manifestations of God's grace within. Paul emphasizes that these fruits are the effects of the Spirit's presence, not the cause. This means that genuine faith in Christ, through the Holy Spirit's work, will produce these qualities, confirming the believer's salvation status.