[22] For then, as if in any vessel, the sailors, and the passengers, and the pilots, had all, under the influence of insanity, agreed to destroy it, those who have joined in the plot against it are none the less involved in the same destruction. For the heaviest of all evils, and almost the only one that is incurable, is the unanimous energy of all the parts of the soul agreeing to commit sin, not one of the parts being able to act with soundness (just as is the case in an evil affecting the whole people), so as to heal those that are sick; but even the physicians being diseased as well as their patients, whom the pestilential disease has overwhelmed and weighs down under a confessed calamity.