Apostle and Abortion
In 1 Corinthians 15:8 Paul refers to himself as an apostle “untimely born”. To be perfectly blunt, Paul appears to be associating himself here with an abortion or the result of a miscarriage. It's a grotesque image.
Paul may have chosen it simply because he came to the whole apostleship game late. That is, he was not someone who lived with Jesus and heard his teaching firsthand; although he was a witness to the resurrection (see Acts 2:22-23; compare Acts 9:1-19).
On the other hand, there may be more to this phrase. There is plenty of evidence that the Corinthians did not think at all highly of Paul. He was weak and trembling, an unimpressive speaker (1 Cor 2:3-4). The Corinthians are the most likely source of the quote about Paul which says that “his bodily presence is weak, and his speech of no account” (2 Cor 10:10). He was known to have physical problems (2 Cor 12:7). These are just some of the more obvious complaints that were made about him.
So it may be that by calling himself one “untimely born”, Paul is frankly acknowledging that he looked bad. And even if he'd been Brad-Pitt-handsome to begin with, years of bodily testing, persecution and imprisonment would've left their mark.
Yet the fact is that he really was born an apostle, timely or not. His authority stemmed from the undeniable truth that he really had seen the risen Lord Jesus on the road to Damascus. He really had been appointed by Christ Jesus personally to carry the message of the gospel, including the resurrection, to the Gentiles. There's no point pretending that Paul gained authority because he was personally powerful, convincing and impressive. His power came from God alone, and God's power in him was all the more convincing because of the weakness of the bearer. “Therefore”, says Paul, “I will boast all the more gladly of my weaknesses, so that the power of Christ may rest upon me” (2 Cor 12:9).
If your pastor looks like he suffered an accident at birth, don't be too hard on him. Listen to the gospel he preaches.