Footnote 19

God must treat them the same, for in fact they are the same thing, as explained in bro. Growcott's explanation of metonymy. Transgression (the moral aspect of sin) arises out of the impulses (or physical aspect of sin). It is therefore impossible to isolate transgression, and sin nature. Sin could not be destroyed unless it is completely destroyed, and destroying the source of sin is an absolute prerequisite (according ot the plan and purpose of God) to the ultimate destruction of all sin.