Christ, the Way, the Truth and the Life, is the light of the conscience
The conscience is man’s most interior and intimate core. That is where he takes refuge with his spiritual faculties in complete solitude: alone with himself or, rather, alone with God whose voice is to be heard in the conscience. That is where he decides good or evil, that is where he chooses the path of victory or defeat. Even if he wanted to, man could not succeed in getting rid of it. With it, whether it approves or whether it condemns, he makes his way along the entire path of life, and again, with it, the truthful and incorruptible witness, he presents himself before the judgment seat of God.
Thus conscience is a sanctuary on the threshold of which everyone must halt, everyone, even fathers or mothers in the case of a child. Priests alone enter there as physicians of souls, but the conscience does not cease to be a jealously guarded sanctuary for all that, of which God Himself desires the privacy should be preserved under the seal of the most sacred of silences. In what sense can one speak of the education of conscience? Our divine Savior has brought his truth and his grace to ignorant and weak mankind: truth to show him the way that leads to his goal; grace to confer on him the strength for being able to attain it. Christ is the Way, the Truth and the Life, not just for everyone taken together but for each one individually.
St. Thalassios the Libyan