Jesus died for our sins.
We say it almost by rote, and usually (if I can be honest) with a sense of emotional detachment. We may be intellectually convinced that Jesus hung on the Cross to ensure that we would enjoy God's forgiveness, and we may even occasionally experience emotions of gratitude for His sacrifice. But for the most part, His crucifixion has very little impact on how we conduct our day-to-day lives. We file it away as essential doctrine, and go merrily along with our various activities resting in the security that we know our basic catechism.
This lack of personal connection with the Cross doesn't necessarily indicate that we fail to understand the extent of the Lord's sufferings. Mel Gibson's 2004 movie, The Passion of the Christ, made sure most evangelicals witnessed as many gory details of crucifixion as Mel could possibly film. And before that A Physician Analyzes The Crucifixion by Dr. C. Truman Davis spelled out all the physical agonies Christ endured, beginning with His sweating blood at Gethsemane. Therefore, we can't blame our indifference to the Cross on ignorance.
The callousness ultimately results from our unwillingness to recognize the excruciating reality of our sin. Yeah, we know we've "fallen short of the glory of God." We may even admit, when pushed, that we've broken a few of His commandments. But how many of us really see ourselves as despicable sinners who deserve nothing but God's wrath?
Our pride causes our inability to truly comprehend Christ's accomplishment on the Cross. Until the Holy Spirit opens our understanding to the depths of our depravity, we possess no power to appreciate the way our sinless Lord endured the torments of hell that rightfully belong to us. We might give a vague acknowledgment that Jesus died for our sins, but we need to truthfully confront the horrible depth and power of the sin that permeates our lives.
Once we own our sin, understanding that it nailed the innocent Prince of glory to the Cross, we can truly rejoice in His amazing grace. We will praise Him for shedding His blood to atone for our sin, recognizing His unexplainable love for creatures as vile as we. And then, filled with a sense of awe and wonder at His goodness, we will marvel as we comprehend the truth that Jesus died for us!