Erudition is defined as the knowledge of an expert in a subject gained through reading and study.
A professor who is a renowned expert in his field and who publishes an extremely well-respected thesis is an example of someone who writes with erudition.
learning acquired by reading and study; scholarship
Origin of eruditionMiddle English erudicioun from Classical Latin eruditio: see erudite
Deep, extensive learning. See Synonyms at knowledge.