7 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].
8 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)!
9 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)!
10 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).
11 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].
12 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).
13 You have heard of my earlier career and former manner of life in the Jewish religion (Judaism), how I persecuted and abused the church of God furiously and extensively, and [with fanatical zeal did my best] to make havoc of it and destroy it.