Can a human being ever fully understand what happened at the cross?
No. The cross is simple enough that God asks people to believe it, yet it is so complex that even a thousand-year lifetime could not comprehend it. The power of the work of the cross is beyond human understanding; it remains impossible for humans to fully grasp, so the requirement is faith, not complete comprehension.
Les explains that the cross is the very bedrock of our salvation. The One who is totally man and totally God humbled Himself of His own volition and became obedient unto death—not an ordinary death, but the most horrible death ever devised, the death of the cross. Les says this is so simple that people stumble over it, yet so complex that he could live to be a thousand years old and never comprehend it. He teaches that it is impossible for humans to comprehend the power of the work of the cross; it is beyond us. God asks us simply to believe it, but the world refuses to do so.