The author invites us to do a test: ask several people on the street what is consciousness. We will probably hear all kind of answers: "Conscience is an inner inspiration that tells us what to do", "It's a strong feeling that approves, censors or accuses", "It's the voice of God, it doesn't fail", "It's difficult to say what it is: it's something so personal, so delicate"
Indeed, it's difficult to say what conscience is: our interior is extremely complex and, inside, we hear different voices that try to judge, to give an opinion or to define good and duty.
For these reasons, the reflection that the author invites us to do is very opportune. He structures it around three questions: What is conscience, that inner judge who judges good and evil in my life? Which is the law that it must follow? Which are the necessary qualities for the voice of conscience to be a good voice, an echo of truth and good?