Christianity Is A Gospel

"O foolish Galatians! Who has bewitched you? It was before your eyes that Jesus Christ was publicly portrayed as crucified.  2 Let me ask you only this: Did you receive the Spirit by works of the law or by hearing with faith?  3 Are you so foolish? Having begun by the Spirit, are you now being perfected by the flesh?  4 Did you suffer so many things in vain- if indeed it was in vain?  5 Does he who supplies the Spirit to you and works miracles among you do so by works of the law, or by hearing with faith?"

- Galatians 3:1-5