Calvin on sound doctrine

2 Timothy 1:13 - Hold fast the form of sound words, which thou hast heard of me, in faith and love which is in Christ Jesus.

Hold the form of sound words. Some explain it thus: Let thy doctrine be, as it were, a pattern which others may imitate. I do not approve of that view. Equally removed from Paul’s meaning is Chrysostom’s exposition, that Timothy should have at hand the image of virtues engraven on his heart by Paul’s doctrine. I rather think that Paul commands Timothy to hold fast the doctrine which he had learned, not only as to substance, but as to the very form of expression; for — the word which Paul employs on this occasion — denotes a lively picture of objects, as if they were actually placed before the eyes. Paul knew how ready men are to depart or fall off from pure doctrine. For this reason he earnestly cautions Timothy not to turn aside from that form of teaching which he had received, and to regulate his manner of teaching by the rule which had been laid down; not that we ought to be very scrupulous about words, but because to misrepresent doctrine, even in the smallest degree, is exceedingly injurious.

–– John Calvin, from his commentary on 2 Timothy