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,
nor did I go up to Jerusalem to those who were apostles before me, but I went away into Arabia; and again I returned to Damascus.
Then after three years I went up to Jerusalem to visit Cephas, and remained with him fifteen days.
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)