When I call to remembrance the unfeigned faith that is in thee; - notes, 1 Timothy 1:5. On the faith of Timothy, see the notes at 1 Timothy 4:6.
Which dwelt first in thy grandmother Lois - That is, the same faith dwelt in her; or, she was a sincere believer in Christ. It would seem probable, from this, that she was the first of the family who had been converted. In the Acts of the Apostles Acts 16:1, we have an account of the family of Timothy: - “Then came he to Derbe and Lystra; and behold a certain disciple was there, named Timotheus, the son of a certain woman which was a Jewess, and believed; but his father was a Greek.” In this account no mention is made of the grandmother Lois, but there is no improbability in supposing that Paul was better acquainted with the family than Luke. There is, at any rate, no contradiction between the two accounts; but the one confirms the other, and the “undesigned coincidence” furnishes an argument for the authenticity of both. See Paley’s Horae Paulinae, in loc. As the mother of Timothy was a Hebrew, it is clear that his grandmother was also. Nothing more is known of her than is mentioned here.
And in thy mother Eunice - In Acts 16:1, it is said that the mother of Timothy was “a Jewess, and believed;” but her name is not mentioned. This shows that Paul was acquainted with the family, and that the statement in the Epistle to Timothy was not forged from the account in the Acts . Here is another “undesigned coincidence.” In the history in the Acts , nothing is said of the father, except that he was “a Greek,” but it is implied that he was not a believer. In the Epistle before us, nothing whatever is said of him. But the piety of his mother alone is commended, and it is fairly implied that his father was not a believer. This is one of those coincidences on which Paley has constructed his beautiful argument in the Horae Paulinae in favor of the genuineness of the New Testament.