10 But thou hast followed (185) In order to urge Timothy, he employs this argument also, that he is not an ignorant and untaught soldier, because Paul carried him through a long course of training. Nor does he speak of doctrine only; for those things which he likewise enumerates add much weight, and he gives to us, in this sentence, a very lively picture of a good teacher, as one who does not, by words only, train and instruct his disciples, but, so to speak, opens his very breast to them, that they may know, that whatever he teaches, he teaches sincerely. This is what is implied in the word purpose He likewise adds other proofs of sincere and unfeigned affection, such as faith, mildness, love, patience Such were the early instructions which had been imparted to Timothy in the school of Paul. Yet he does not merely bring to remembrance what he had learned from him, but bears testimony to his former life, that in this manner he may urge him to perseverance; for he praises him as an imitator of his own virtues; as if he had said, “Thou hast been long accustomed to follow my instructions; I ask nothing more than that thou shouldst go on as thou hast begun.” It is his wish, however; that the example of his “faith, love, and patience” should be constantly before the eyes of Timothy; and for that reason he dwells chiefly on his persecutions, which were best known to him.
(185) “Having spoken of the troubles which were to befall the Church, and having exhorted Timothy to be firm, so as not to shrink from them, the Apostle adds, that now, for a long time, he must have been prepared for all this, because he had been taught in a good school. ‘Thou hast known intimately,’ like one who had followed him step by step; for such is the import of the word which Paul uses: ‘Thou hast known well the course which I have pursued.’” — Fr. Ser.