Passage
Knowing that he that is such is subverted, and sinneth, being condemned of himself.
Knowing that he that is such is subverted, and sinneth, being condemned of himself.
Titus 3:9 But avoid foolish questions, and genealogies, and contentions, and strivings about the law; for they are unprofitable and vain.
Titus 3:10 A man that is an heretick after the first and second admonition reject;
Titus 3:11 Knowing that he that is such is subverted, and sinneth, being condemned of himself.
Titus 3:12 When I shall send Artemas unto thee, or Tychicus, be diligent to come unto me to Nicopolis: for I have determined there to winter.
Titus 3:13 Bring Zenas the lawyer and Apollos on their journey diligently, that nothing be wanting unto them.
The verse centers on "condemn", "knowing", "such", "subverted", "sinneth", "condemned", and "himself". It is saying that the verse draws attention to "condemn" and "knowing", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 10's "A man that is an heretick after..." into verse 12's "When I shall send Artemas unto thee...", so "condemn" and "knowing" belong inside that flow. In Titus context, the local focus is Christ, faith, and discipleship.
A plain takeaway is to answer the verse's own emphasis on "condemn" and "knowing" with trust shaped by these words, not by a vague optimism outside the passage.