Just thought I would use your your post to bring the Scripture you were talking about to the table. If one reads this passage, Paul specifically let's us all know that his message came directly from Jesus, Paul became a disciple of Jesus, just like Peter and the rest. Jesus is not going to tell Paul to preach something different than what He preached. For Jesus said to the Pharisees a house divided against itself cannot stand (mark 3:25) Jesus is not going to contradict himself in any way, for He only ever said what The Father said, and did what a he saw The Father do (jn 5:19; 14:10)...so in order for Paul to be preaching the truth of the gospel, and be in line with Jesus he has to preach what Jesus preached. Otherwise what Paul taught would not have been from the Holy Spirit, and thus would not be in our Bibles for it would be in error.
PAUL, AN apostle–[special messenger appointed and commissioned and sent out] not from [any body of] men nor by or through any man, but by and through Jesus Christ (the Messiah) and God the Father, Who raised Him from among the dead– Who gave (yielded) Himself up [to atone] for our sins [and to save and sanctify us], in order to rescue and deliver us from this present wicked age and world order, in accordance with the will and purpose and plan of our God and Father– To Him [be ascribed all] the glory through all the ages of the ages and the eternities of the eternities! Amen (so be it). I am surprised and astonished that you are so quickly turning renegade and deserting Him Who invited and called you by the grace (unmerited favor) of Christ (the Messiah) [and that you are transferring your allegiance] to a different [even an opposition] gospel. Not that there is [or could be] any other [genuine Gospel], but there are [obviously] some who are troubling and disturbing and bewildering you [with a different kind of teaching which they offer as a gospel] and want to pervert and distort the Gospel of Christ (the Messiah) [into something which it absolutely is not]. But even if we or an angel from heaven should preach to you a gospel contrary to and different from that which we preached to you, let him be accursed (anathema, devoted to destruction, doomed to eternal punishment)! As we said before, so I now say again: If anyone is preaching to you a gospel different from or contrary to that which you received [from us], let him be accursed (anathema, devoted to destruction, doomed to eternal punishment)! Now am I trying to win the favor of men, or of God? Do I seek to please men? If I were still seeking popularity with men, I should not be a bond servant of Christ (the Messiah). For I want you to know, brethren, that the Gospel which was proclaimed and made known by me is not man's gospel [a human invention, according to or patterned after any human standard]. For indeed I did not receive it from man, nor was I taught it, but [it came to me] through a [direct] revelation [given] by Jesus Christ (the Messiah).
Galatians 1:1, 4-12 AMP
http://bible.com/8/gal.1.1-12.AMP
Blessings to all