John Chrysostom
That is, nowhere do people wait to hear our account of you. Rather, people who have not visited you and have seen nothing anticipate with their accounts of you those who were with you and saw your struggles. Thus your faith has become known everywhere by report.
Therefore we do not need to tell of your deeds in order to rouse others to the same zeal. For what they ought to hear from us, they themselves tell before we do.
Although in such cases envy often acts in people, your excellence conquered even envy. They became heralds of your struggles. Though they fell behind you, they still do not keep silent, but even tell of you before others do. If they act in this way, then our words cannot fail to be trusted.
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What does “what kind of entrance we had to you” mean? It means that it was joined with dangers, with a thousand deaths. Yet nothing troubled you. On the contrary, you treated us as though nothing had happened. After this you received us as though you had suffered no evil, but had enjoyed countless blessings.
The entrance mentioned here was the second one. The Apostle and his companions left Thessalonica for Berea while being persecuted. Later, when they came again to the Thessalonians, they were received by them in such a way that the Thessalonians themselves were honored by the Apostles. These latter were ready to lay down their own souls for them.
Thus the expression “what kind of entrance we had to you” has a double meaning. It contains praise both for the Apostle and his companions and for the Thessalonians. But the Apostle turned it into praise of the Thessalonians.
“How,” he says, “you turned to God from idols, to serve the living and true God.” That is, you turned very easily, with great readiness, and felt no need of special effort in order to decide to serve the living and true God.