Because by a good manner we can make another person as kind as our own father and mother; as kind and sympathetic as our own brother and sister, as respectful as our own son and daughter, if we only have that manner. If we know how to be motherly, how to be fatherly to the young, if we know how to behave respectfully towards our elders, if we know how sympathetic and polite and good we ought to be to those who are poor or are servants, or who depend on us, if our manner is beautiful, there is no heart we can fail to win. The children of the wealthiest people may, owing to the ill manner of the parents, want to sacrifice all their fortune, their father and mother, in order to get away from them; they would even sacrifice life itself.