Ignorance is the Real Arrogance

Petrarch on the arrogance of ignorance:

Believe me, many things are attributed to gravity and wisdom which are really due to incapacity and sloth. Men often despise what they despair of obtaining. It is in the very nature of ignorance to scorn what it cannot understand, and to desire to keep others from attaining what it cannot reach. Hence the false judgments upon matters of which we know nothing, by which we evince our envy quite as clearly as our stupidity. [Source: Petrarch: The First Modern Scholar and Man of Letters, by James Harvey Robinson (citing a letter from Petrarch to Boccacio), pg. 391]