Why did they not seem inflicted by the harshness his people knew?
The National Gallery "Virgin of the Rocks" certainly, with help from Ambrogio de Predis; in this the Florentine character of the original is modified by an admixture of Milanese elements, the tendency to harshness and over-elaboration of detail softened, the strained action of the angel's pointing hand altogether dropped, while in many places pupils' work seems recognizable beside that of the master.
The hills and farmlands gradually turned to inner suburbia and then to the harshness of urban streets, choked tightly with the crush, smells and sounds of the city.
In the middle notes of the musical register the maximum harshness occurs when the beats are about 30.
But the harshness certainly reflects a characteristic attitude of mind.