Romans 3:7-8 Someone might argue, “If my falsehood enhances God’s truthfulness and so increases his glory, why am I still condemned as a sinner?” Why not say—as some slanderously claim that we say—“Let us do evil that good may result”? Their condemnation is just! 

God is just in all that He does, including respecting the choice of those who select condemnation versus accepting God’s grace.