What does Titus 3, verse 9-11 mean?

In his letter to Titus, the apostle Paul directed that, after being admonished twice, a man who continued promoting a sect be rejected, evidently meaning that he be expelled from the congregation. (Tit 3:10) Those who refused to become involved in creating divisions within the congregation or in supporting a particular faction would distinguish themselves by their faithful course and give evidence of having God’s approval. This is apparently what Paul meant when telling the Corinthians: “There must also be sects among you, that the persons approved may also become manifest among you.”—1Co 11:19.