Hopefully making theology simpler to understand! (2 Corinthians 1:12)

[Jesus] whom God put forward as a propitiation by his blood, to be received by faith. This was to show God’s righteousness, because in his divine forbearance he had passed over former sins.
Romans 3:25, ESV

God’s mercy and grace are shown through not killing us immediately for our sins but coming Himself to take our punishment on Himself to save us who believe from His wrath.