2:13 {11} For this cause also thank we God without ceasing, because, when ye received the word of God which ye heard of us, ye received [it] not [as] the word of men, but as it is in truth, the word of God, which effectually worketh also in you that believe.
(11) Having approved his ministry, he commends again (to that end and purpose that I spoke of) the cheerfulness of the Thessalonians which was due to his diligence in preaching, and their brave patience.
2:13 Not [as] the word of men. They had received the gospel preached by Paul as the word of the Lord, a divine message.
Which effectually worketh. The word, received into the heart, is the good seed of the kingdom, and springeth up to eternal life.
2:13-16 We should receive the word of God with affections suitable to its holiness, wisdom, truth, and goodness. The words of men are frail and perishing, like themselves, and sometimes false, foolish, and fickle; but God's word is holy, wise, just, and faithful. Let us receive and regard it accordingly. The word wrought in them, to make them examples to others in faith and good works, and in patience under sufferings, and in trials for the sake of the gospel. Murder and persecution are hateful to God, and no zeal for any thing in religion can excuse it. Nothing tends more to any person or people's filling up the measure of their sins, than opposing the gospel, and hindering the salvation of souls. The pure gospel of Christ is abhorred by many, and the faithful preaching of it is hindered in many ways. But those who forbid the preaching it to sinners, to men dead in sin, do not by this please God. Those have cruel hearts, and are enemies to the glory of God, and to the salvation of his people, who deny them the Bible.