His deliverance from sin and death will be effected, not by the development of any natural capacity for good, but by his being induced to quit the path (or paths) of Nature, and to walk, under Divine direction, in some new and narrow path.
But how will this end be achieved?
That Man cannot discover the path of salvation for himself will, of course, be taken for granted.

The catastrophe of the Fall has corrupted his whole nature, and has therefore blinded him to the light of truth.

"The way of man is not in himself: it is not in man that walketh to direct his steps." The promptings of his own nature, which he would follow if left to himself, can do nothing but lead him astray.

It will also be taken for granted that the path of salvation is a path of action.

When the whole inward disposition is hopelessly corrupt, the idea of achieving salvation by growing, by bringing one's hidden life to the perfection of maturity, must perforce be abandoned.