How do we know that God's goodness is revealed in Jesus' death?

In Exodus 33:19, God declares that He will make all His goodness pass before Moses, which ultimately finds its fullest expression in Jesus' sacrificial death on the cross. When Christ was crucified, it was the ultimate act of love, demonstrating God's desire for reconciliation with humanity. This act reveals the extent of God's goodness because in giving His Son, He made a way for sinners to be justified and reconciled. The cross shows that God's goodness cannot be separated from His justice; both attributes are perfectly harmonized in the salvation of sinners. Therefore, to understand God's goodness, one must look to the cross, wherein His love for the unworthy is perfectly displayed.