396. But in order that what follows in this and the succeeding chapters on Freedom of choice, on Reformation, on Regeneration, and so forth, may be so presented in the light of reason as to be clearly seen, it is necessary to premise something respecting the will and understanding, good and truth, love in general, the love of the world and love of self in particular, the external and internal man, and the merely natural and sensual man. These things must be made clear, that the rational sight of man, in his perception of what follows further on, may not be as it were in a dense fog, and in that state be like one wandering through the streets of a city until he knows not the way home. For what is theology separated from the understanding, or with the understanding not enlightened when the Word is read, but like a lamp in the hand giving no light, such as were those of the five foolish virgins who had no oil? On each of these subjects, then, in their order.