Charles Spurgeon Commentary Romans 6:17

"But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;" — Romans 6:17 (ASV)

But God be thanked, that you were the servants of sin, but you have obeyed from the heart that form of doctrine which was delivered you.

Or into which you were delivered. God has taken you, melted you down, and poured you into a new mold. God be thanked for flint; you are not what you used to be. Although you are not what you hope to be, yet you have reason to bless God that you are not what you once were. You have obeyed from the heart that form of doctrine into which you were delivered.

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.

Or, as the marginal reading renders it, in harmony with the original, whereto ye were delivered, for the doctrine was the mould, and you were the metal, reduced to a molten condition, and then poured into the mould to take the shape of gospel truth.

God be thanked for this – that, though you did formerly serve sin, you now serve it no longer.