God is just

Justice is based on law, following the cause and effect relationship, and speaks of order, stability, fairness and balance. “Do not be deceived: God cannot be mocked. A man reaps what he sows (Galatians 6:7).” The action of this principle is observed in both the natural world and the spiritual: when you sow a wheat grain, you will reap wheat grains; when you do good deeds, you will become a good person. You will not reap wheat grains if you sow Bermuda grass and you will not become a good person if you do bad deeds. Bad deeds will make you an evil person. And this is only one way of God’s acting justly.

If God’s justice is the underlying principle that defines the existence of even those who do not want to conform to it, we can imagine how much more justice there is in those who want to conform to it!

This does not mean that there is no injustice in the world, because the distortion of justice results in exactly this, but God allows it to happen so that people can see how bad injustice is and begin to want to get rid of it and return back to justice. Therefore God uses injustice as an instrument to help us make the right choice and do the right thing so that we can live justly and in harmony with Him and each other now (only imperfectly) and continue living so forever after He will separate the just from the unjust on the Day of Judgement when perfect justice will start to reign and all the injustice will be sent to hell.

Land that drinks in the rain often falling on it and that produces a crop useful to those for whom it is farmed receives the blessing of God. But land that produces thorns and thistles is worthless and is in danger of being cursed. In the end it will be burned.

Hebrews 6:7-8