Why so many sacrifices in the Old Testament? There were daily, weekly, monthly and yearly animal sacrifices to be made. Day after day, week after week, month after month and year after year it was bloody.
It was to make Israel realize 1) the enormity of sin, 2) the importance of maintaining fellowship with God and 3) the absolute necessity of a sacrifice for the forgiveness of sins.
That such number of sacrifices were needed should point them to the enormity of sin. That such frequency of sacrifices must be made should point them to the importance of maintaining fellowship with God and the absolute necessity of a sacrifice for the forgiveness of sins.
All these, we see at the cross, when the Lamb of God was sacrificed for the sins of the world.
Reader, learn a lesson---sin in your life is utterly evil and atrocious. The only thing that can deal with it is the great sacrifice of the Lord Jesus on the cross, when He died for your sins and rose again from the dead.
The animal sacrifices in the Old Testament could never take away sin. It only served to remind Israel of their sins continually. But coming to Christ in faith settles it once and for all.