“My daughter, I entreat you never speak evil of any, either directly or indirectly; beware of ever unjustly imputing sins or faults to your neighbor, of needlessly disclosing his real faults, of exaggerating such as are overt, of attributing wrong motives to good actions, of denying the good that you know to exist in another, of maliciously concealing it, or depreciating it in conversation.”