One of the reasons that we include confession of sin in our weekly liturgy is not just that we recognize that we are sinful, but we receive God’s revelation that He is perfectly righteous. God not only acts in accord with moral law, what we refer to as moral law comes from His character. His nature is right. He always does what is justifiable.
We don’t, of course. This is why we love the Son who gave Himself for us that we could be justified, declared righteous by God. This is very good news for the list of the unrighteous in 1 Corinthians 6:9-11 whose unrighteousness would keep them out of God’s kingdom.
But God’s righteous character applies in more than one argument. I’ve been trying different ways of saying it over the last few months, but here it is from the author of Hebrews.
For God is not so unjust as to overlook your work and the love that you showed for his sake in the serving of the saints, as you still do. (Hebrews 6:10)
Note that this means that God sees your work; His seeing is part of His righteousness. This means that God would be unrighteous to ignore the love that you demonstrate to others. This doesn’t mean that we are working our way to salvation, but that these works are “things that belong to salvation” (Hebrews 6:9).
You will reap what you sow because God is not crooked. Your labor in the Lord is not in vain because God is just (1 Corinthians 15:58). So don’t be sluggish (Hebrews 6:12). Devote yourselves to the service of the saints (1 Corinthians 16:15), not just because it is right, but because God will justifiably bless you.