Bible Verses About The Gospel: Those Who Receive, should Adhere to the Truth of

I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:

Which is not another; but there be some that trouble you, and would pervert the gospel of Christ.

But when I saw that they walked not uprightly according to the truth of the gospel, I said unto Peter before them all, If thou, being a Jew, livest after the manner of Gentiles, and not as do the Jews, why compellest thou the Gentiles to live as do the Jews?

Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.