Galatians 6:8, “Whoever sows to please their flesh, from the flesh will reap destruction; whoever sows to please the Spirit, from the Spirit will reap eternal life.”
This does not mean that God is a vengeful God looking to avenge any slight sin. The image of sowing-reaping indicates that the process of moral consequences is much more natural than that. This reference to agriculture indicates that the moral universe has processes. If you sow seed poorly, you reap a poor crop. If you eat fatty foods, you reap a poor heart. If you give in to your sinful nature, you reap spiritual breakdown and even destruction.