“But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness and self-control. Against such things there is no law (Galatians 5:22,23)
These are a description of our NEW nature in Christ.
They are brought to fruition in us by living out and leaning into our NEW nature.
2 Cor. 5:17 Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here!
It is by staying connected to Him and living out our NEW identity that we bear/manifest these fruit.
The better we become at walking in our NEW nature the more we will manifest these fruit.
Done.. I can explain any more than that.