KJV:
But the fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith,
NKJV:
But the fruit of the Spirit is love, joy, peace, longsuffering, kindness, goodness, faithfulness,
NIV:
But the fruit of the Spirit is love, joy, peace, forbearance, kindness, goodness, faithfulness,
Interpretation:
Joy appears as the second fruit the Holy Spirit produces in believers. The Spirit naturally generates joy in those who walk with Him. Joy is not something believers manufacture through effort. It grows organically as the Spirit works within. Christians can experience joy because the Spirit dwells in them.