God Extremely Just - Supreme Justifier!
Paul said this in Romans 3:25–26 and it is one of the most important sentences in the Bible for understanding how Christ relates to the Psalms — and to the Old Testament in general:
God put Christ forward as propitiation by his blood and it was to be received by simple faith. This was to show God’s righteousness, because in his divine forbearance he had passed over former sins. This is exactly what 2 Samuel 12:13 says God did — when he passed over David’s sin. It was to show his righteousness at the present time, so that he might be first the just and then the justifier of the one’s who have faith in Jesus.
In other words, the outrage that we feel when God seems to simply pass over David’s sin or even someone else’s would be good outrage if God were simply sweeping it all under the rug. He is not. God sees from the beginning of time, past, present, and future, He sees forward and backwards through centuries right back to the death of his Son, Jesus Christ, who would die in David’s place and my place, so that faith in God’s mercy and God’s future redeeming work unites guys like David, you and I, with Christ. And in God’s all-knowing mind, our sins are counted as Christ’s sins and Christ’s righteousness is counted as his righteousness, and God justly passes over all of our sin. The death of the Son of God is extreme enough, and the glory of God that it upholds is great enough, that God is vindicated in passing over all of this world’s adultery and murder and lying, covering a multitude of sin!
The next time you withhold forgiveness or speculate on someone else’s present spiritual relationship status or heart for God, or offer conjecture about the quality of another child’s standing with Him, This would be good food for thought!