Thomas Boston, Works, Volume 1, “Of the Providence of God”:
Whosoever would walk with God, must be due observers of the word and providence of God, for by these in a special manner he manifests himself to his people. In the one we see what he says ; in the other what he does. These are the two books that every student of holiness ought to be much conversant in. They are both written with one hand, and they should both be carefully read, by those that would have not only the name of religion, but the thing. They should be studied together, if we would profit by either ; for being taken together, they give light the one to the other ; and as it is our duty to read the word, so it is also our duty to observe the work of God, Psal. xxviii. 5.