As you read through Scripture, sin has always been a problem. No shock there. You’ve struggled with sin, I’ve struggled with sin. So did our parents, grandparents, great-great-grandparents on down the line. If, in BC days (before Christ or for the purposes of my illustration, before the cross), we would have been fortunate enough to have been God’s chosen people, the Jews, we would have been familiar with the process for dealing with sin. It involved blood. There had to be a sacrifice made for the sins of the people. And for 365 days, their sins were taken away. But, it had to happen again the next Day of Atonement.
The cross symbolizes a significant change. And it had everything to do with WHO was raised to hang on the cross.