That the soul is 'deprived of the Spirit and of all divine light, and that he is not disposed to those objects which the law of God enjoins, is too evident to be questioned. Only conscience is left to act in him along with the dim outline of the moral law, of which the lingering remains may still be traced on every human heart. And it may be said of conscience, that its voice is heard more in accusing than in excusing. It is noteworthy that in the entire earthly life of Jesus there is no mention of conscience, for the obvious reason that He had the full image of God, and received the Spirit not by measure.
The doctrine of the Holy Spirit (Cunningham lectures) 165