I am astonished that you are so quickly deserting him who called you in the grace of Christ and turning to a different gospel--
not that there is another gospel, but there are some who trouble you and want to pervert the gospel of Christ.
But even if we, or an angel from heaven, should preach to you a gospel contrary to that which we preached to you, let him be accursed.
As we have said before, so now I say again, If any one is preaching to you a gospel contrary to that which you received, let him be accursed.
Am I now seeking the favor of men, or of God? Or am I trying to please men? If I were still pleasing men, I should not be a servant of Christ.
For I would have you know, brethren, that the gospel which was preached by me is not man's gospel.
For I did not receive it from man, nor was I taught it, but it came through a revelation of Jesus Christ.
For you have heard of my former life in Judaism, how I persecuted the church of God violently and tried to destroy it;
and I advanced in Judaism beyond many of my own age among my people, so extremely zealous was I for the traditions of my fathers.
But when he who had set me apart before I was born, and had called me through his grace,
was pleased to reveal his Son to me, in order that I might preach him among the Gentiles, I did not confer with flesh and blood,
Revised Standard Version of the Bible, copyright 1952 [2nd edition, 1971] by the Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved. (Revised Standard Version - Holy Bible)