“But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.”
King James Version (KJV)
6:17 The form of doctrine into which ye have been delivered - Literally it is, The mould into which ye have been delivered; which, as it contains a beautiful allusion, conveys also a very instructive admonition; intimating that our minds, all pliant and ductile, should be conformed to the gospel precepts, as liquid metal, take the figure of the mould into which they are cast.
Ro 6:17 But God be thanked. Not that they have been sinners, but that, having been sinners, they had become obedient to Christ. Obeyed from the heart. No outward obedience is of the slightest value unless the heart turns to God. That form of doctrine. Macknight paraphrases this: ``I thank God, that although you were formerly the slaves of sin, ye have willingly obeyed the mould of doctrine into which ye were cast at baptism.'' Others, Chrysostom for example, say it refers "to Christian teaching as a type of holy living". The nature of Paul's argument, and the fact that it is founded on the significance of baptism, makes Macknight's explanation probable.