Why are the dwarfs kind?

Long time ago, when the dwarfs were officially knighted, they had to swear under oath that they would tell only truth and act with honour and they would be brave and kind. The feature of kindness became so imminent to them that nowadays being kind and helpful is perceived as totally natural. On the other hand the lack of kindness and friendliness is strongly abhorred. The big pioneer of kind behaviour is the dwarf Życzliwek (Kindheart). He reminds both people and the young generation of small citizens living in underground Wrocław that being kind and friendly on a daily basis has a great value.