How do we know that believers must bear fruit?

The necessity of bearing fruit in the life of a Christian is established through several key passages in Scripture. In John 15:8, Jesus declares, 'This is to my Father's glory that you bear much fruit, showing yourselves to be my disciples.' This fruitfulness is not merely optional; it is evidence of a genuine relationship with Christ. Furthermore, Galatians 5:22-23 outlines the character of this fruit, which includes love, joy, peace, and other virtues that arise from the life of the Spirit. Thus, true believers naturally bear fruit as a reflection of their union with Christ, symbolized by their attachment to Him as the vine.