Here is a picture of my garden. I dug the plot of land to plant it. Nurtured the seedlings. Watered the plants in some very hot, dry weather. I even picked and ate some.
Then I went on a trip... and forgot about them. And now this fruit, "fresh" tomatoes, just rot in my yard.
In church we talk a lot about discipleship (or at least we should) - which means developing the fruits of the Spirit - which come from the Spirit. But what a waste if we develop these fruits, but never use them, or use them for shameful, hurting things. Galatians 5, where the fruits of the Spirit are listed, talks about the danger of this too:
But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law. And those who belong to Christ Jesus have crucified the flesh with its passions and desires. If we live by the Spirit, let us also keep in step with the Spirit. Let us not become conceited, provoking one another, envying one another. Galatians 5.22-26