Plato had said that the worst thing that could happen to us was to have a “lie” in our souls about reality. He meant both a lie that we accepted as true from others and a lie that we put in our own souls in order to justify our actions. Plato’s words were precise. The “lie” in our soul is chosen to be there in order to allow us to do what we want. What is also implies is that the consequences of our “lie” will manifest themselves in the world whether we like it or not.
In this sense, we are in dire need of sorting things out. The worst thing we can do to a sinner is to tell him that his sin is no sin, but a “right” or a “liberty.” Once the sinner is told that what he does is all right, he has little possibility of rectifying himself. He no longer sees the Church as an abiding beacon of truth that stands firm even if he rejects it. If the Church is not clear about what is true, the sinner has scarce hope of finding his way out of whatever evil he has chosen.