[Jesus said:] By this my Father is glorified, that you bear much fruit and so prove to be my disciples. These things I have spoken to you, that my joy may be in you, and that your joy may be full. John 15:8, 11 ESV

For we are his workmanship, created in Christ Jesus for good works, which God prepared beforehand, that we should walk in them. Eph. 2:10 ESV

Not works-righteousness, but works-fruitfulness. To God's glory and our joy.