Others more directly supply the word ημεν, so that it would be, “You know how, with each one, we were exhorting,” or “we exhorted.” While agreeing that this is admissible, a third group says that there is no need for this addition. A similar verb already appears above, namely at the end of verse ten: “we were among you who believe,” εγενηθημεν. The Apostle mentally repeated it here, but did not write it so that it would not obscure “exhorting” and the rest. In these words, together with “walk worthily of God,” lies the whole force of the discourse.
Those who have believed must live according to faith. This life was not only inward, but also had to be expressed outwardly. The former outward order was pagan in many ways, even in essential matters, and did not agree with the Gospel. Therefore, after converting the Thessalonians, the Apostles undertook to order the life of the new Christians in family and civic life, besides religious life, in which the essence of the matter lay.
“Each one of you.” Saint Chrysostom says, “He passed over no one, neither small nor great, neither rich nor poor, but everyone who had need, without distinction.” Surely it was necessary to speak with each of the newly converted. With some, perhaps, there was much discussion and explanation before he understood and agreed to order his life according to the spirit of the new life. Each could have had circumstances of life that required explanation, so that he might know how to act in them according to the Gospel.
“As a father his children” indicates the source of such tireless care, namely, his fatherly love for them. Above, when the Apostle spoke of their conversion, when they were only being born into spiritual life, he compared himself to a mother. Now, when they had been reborn and had to be nurtured and led to perfection, he compares himself to a father.
In the correction of morals, one had to show not only the tenderness of maternal feeling, but also the firmness of a father’s will and authority, experience, and prudence. Fathers are usually distinguished by these qualities, in which mothers are not quite as strong.