Paul noted here that the gospel of Christ caused him to suffer, as the world considered Paul an “evildoer” because of his teacher. Regardless, Paul was willing to suffer, knowing that the word of God could not be stopped by the efforts of men: “but the word of God is not chained” (9).
So for the sake of those who would respond in faith to his preaching, “the elect”, Paul endured his suffering. He wrote to the Romans, “So, as much as is in me, I am ready to preach the gospel to you who are in Roman also” (Romans 1:15). As a result, Paul was responsible for the salvation of many.
Verses 11-13 contain what Paul referred to as a faithful saying. This is not a quotation from scripture, it may have been lyrics from an early hymn. Whatever the origin, as Paul states, the words are true. Essentially, God can only be Himself. He cannot lie. Therefore, all of the promises He has made to man regarding faithfulness and reward are true promises and will be accomplished!