On what basis did sinners approach God before and after the cross?
Before Christ died, sinners approached God on the basis of animal blood. On this side of the cross, believers approach God on the basis of Christ's blood. The four Gospels record events before Christ's crucifixion, so they contain no shed blood of Christ, but Paul knows Christ crucified.
Les explains that before the cross, sinners approached God on the basis of animal blood. On this side of the cross, the basis is Christ's blood. He agrees with the gentleman who wrote that this means the Gospels really belong to the Old Testament, because everything in the Gospels is before Christ is crucified and there is nothing in the four Gospels of the shed blood of Christ—it couldn't be, since it hadn't happened yet. But Paul knows Christ crucified, and the ascended Lord revealed these things to him.