Glorying in the Cross

What was the reason they wanted the Galatians to be circumcised? Why was this matter so serious that Paul had to write to warn them, in his own hand? What does the cross symbolize that Paul speaks of here? How many messages are in the Scriptures, as many as there are men that wrote it or one according to the Holy Spirit? Why is the Gospel to the exclusion of all else? Why does all the glory have to go to God in Christ alone? Who are those that glory only in Christ crucified? Why is it so vital to look to Christ’s death on the cross?