We proceed to remark again, and in connection with what has been said, that the providences of God are, to a considerable extent, the interpreters of the mind of the Holy Spirit. The mind of God, as it is disclosed in his providences, and the mind of the Holy Spirit, as it reveals itself in the soul are one; and consequently in their different developments from time to time can never be at variance, but will always be in harmony with each other. And not only this, they have a relation to each other, which is mutually and positively illuminative. They throw light, the one upon the other. Certain it is that the mind of the Spirit, in all cases of mere practical action and duty, cannot, as a general thing, be clearly and definitely ascertained, except in connection with providential dispensations. Such dispensations are the outward light, which corresponds to and throws a reflex illumination upon the inward light. And this is so general a law of the divine operation, that persons, who are truly led by the Spirit of God, are generally and perhaps always found to keep an open eye upon the divine providences, as important and true interpreters of the inward spiritual leadings.
Hardly any thing, in the conduct of the divine life in the soul, is more important than thus to keep an open and faithful eye upon the arrangements of divine providence. Until the divine intimations within are cleared up and illustrated by the subsequent openings of Providence, it seems to me to be the duty of Christians to remain in the attitude of patient expectation, and of humble and quiet faith. It is true, we may already be possessed of the inward voice, the declarations of the Spirit in the soul. But these inward intimations, taken by themselves, may, in many cases, be very obscure. And so long as we do not satisfactorily know the information involved in them and the issues to which they lead, it is obviously a duty to keep looking upward, in a childlike simplicity and faith, for those further developments, which the openings of Divine Providence may impart.
— edited from The Interior or Hidden Life (2nd edition, 1844) Part 3, Chapter 2.