Thematic Bible: Preach without authority

Then, fourteen years later, I went up to Jerusalem again, accompanied by Barnabas; I took Titus with me also. (It was in consequence of a revelation that I went up at all.) I submitted the gospel I am in the habit of preaching to the Gentiles, submitting it privately to the authorities, to make sure that my course of action would be and had been sound. But even my companion Titus, Greek though he was, was not obliged to be circumcised. read more.
There were traitors of false brothers, who had crept in to spy out the freedom we enjoy in Christ Jesus; they did aim at enslaving us again. But we refused to yield for a single instant to their claims; we were determined that the truth of the gospel should hold good for you. Besides, the so-called 'authorities' (it makes no difference to me what their status used to be ??God pays no regard to the externals of men), these 'authorities' had no additions to make to my gospel. On the contrary, when they saw I had been entrusted with the gospel for the benefit of the uncircumcised, just as Peter had been for the circumcised (for He who equipped Peter to be an apostle of the circumcised equipped me as well for the uncircumcised), and when they recognized the grace I had been given, then the so-called 'pillars' of the church, James and Cephas and John, gave myself and Barnabas the right hand of fellowship. Our sphere was to be the Gentiles, theirs the circumcised.

But the God who had set me apart from my very birth called me by his grace, and when he chose to reveal his Son to me, that I might preach him to the Gentiles, instead of consulting with any human being, instead of going up to Jerusalem to see those who had been apostles before me, I went off at once to Arabia, and on my return I came back to Damascus. read more.
Then, after three years, I went up to Jerusalem to make the acquaintance of Cephas. I stayed a fortnight with him. I saw no other apostle, only James the brother of the Lord. (I am writing you the sheer truth, I swear it before God!) Then I went to the districts of Syria and of Cilicia. Personally I was quite unknown to the Christian churches of Judaea; they merely heard that 'our former persecutor is now preaching the faith he once harried,' which made them praise God for me.