How does the provided text describe the act of slander and its paradoxical benefits?

The text from Chapter 19 describes slander as a powerful, irrepressible impulse that rises from the stomach to the tongue, bringing satisfaction to the speaker. Paradoxically, the slanderer is framed as a "benefactor" and "highly venerable." This is because, on the pretext of slander, they point out a person's faults, making them alert and helping to avert future calamities. As Chapter 19 metaphorically states, while some use soap or water to remove dirt, the slanderer "removes it with his tongue," thus providing an unconventional but effective service to the one being slandered by forcing them into self-reflection.