We often value the exterior and superficial aspect of things more than their inner reality. Bad manners taint everything - even justice and reason. The "how" of things matters most, and even the most disagreeable matters can be sweetened and gilded over with the proper appearance. Such is the bias and the weakness of the human mind.
Source: the Marquise Sablé’s work is in Maxims and Various Thoughts (Maximes et pensées diverses) 1678
Contributed by: Zaady