The apostle Paul had worked tirelessly for the conversion and edification of the Thessalonians. For this reason he was thankful to God that these faithful brethren responded to his preaching with fervor.
He was especially thankful that they had received his words, not as the words of mere men, but “as it is in truth, the word of God, which effectively works in you who believe” (13).
In this, three things are understood. 1) Paul spoke by inspiration. The Apostle Peter agreed with this assessment, categorizing the teaching of Paul as scripture (cf. 2 Peter 3:16). 2) His words were effective to their salvation. What Paul preached was “the gospel of Christ”, “the power of God unto salvation” (cf. Romans 1:16). 3) They had proven themselves worthy by their response to the gospel. Specifically, Paul referred to their perseverance in the face of persecution at the hands of the Jews (vs. 14-16).
This serves as an example to all Christians. As the word of God works salvation in those who persist in obedience, we do well to be steadfast in our profession.
