Accordingly, Christians have always measured sin, in part, by the suffering needed to atone for it. The ripping and writhing of a body on a cross, the bizarre metaphysical maneuver of using death to defeat death, the urgency of the summons to human beings to ally themselves with the events of Christ and with the person of these events, and then to make that person and those events the center of their lives —these things tell us that the main human trouble is desperately difficult to fix, even for God, and that sin is the longest-running of human emergencies.