"The Spirit not only thus reveals divine truth, having guided infallibly holy men of old in recording it, but He everywhere attends it by his power. All truth is enforced on the heart and conscience with more or less power by the Holy Spirit, wherever that truth is known. To this all-pervading influence we are indebted for all there is of morality and order in the world. But besides this general influence, which is usually called common grace, the Spirit specially illuminates the minds of the children of God, that they may knew the things freely given (or revealed to them) by God. The natural man does not receive them, neither can he know them, because they are spiritually discerned. All believers are therefore called (πνευματικοί) spiritual, because thus enlightened and guided by the Spirit" (Charles Hodge, Systematic Theology, Volume 1, p. 532; underlining mine--CD).
A couple of absolutely necessary correctives for the "common grace" view of God-hater, Charles Hodge:
Holy Spirit Conviction