God doth not use to set his people to work in the dark. They are the “children of light,” and they are no “deeds of darkness” which they have to do. However others are blinded, they shall see; yea, he always suits their light to their labour, and gives them a clear discerning of what he is about. The Lord God doth nothing, but he reveals his secrets to his servants. The light of every age is the forerunner of the work of every age.
– John Owen –
from a sermon entitled The Shaking and Translating of Heaven and Earth, volume 8 of Works, page 273