It is then settled: he will investigate whether God, the fountain of all truth, the key of all mysteries, be not anywhere revealed. To seek Him with … - Alexandre Vinet

Has the reason shared the condition of the other faculties, which our fall has so grievously injured? Is the reason corrupted? Mediately, yes; immediately, no: at least that is my belief. Our reason is the reporter of our sensations: if our sensations make a false deposition, our reason will make a false judgment. And this is what happens through the obscuration of our moral sense and the tumult of our passions; the judge is uncorrupted, but he is misinformed. p. 35

The light of conscience ... enters the eyes of the soul, as the light of the sun enters the eyes of the body; and to open the former requires no greater effort than to open the latter.

Man feels in himself passions which ought to obey, and a reason which ought to command. But it is in vain: the war is endless; victory on either side is impossible. Neither can reason subdue the passions, nor can the passions put reason to silence. p. 17