A foolish man, who among people comes, had best be silent; for no one knows that he knows nothing, unless he talks to much. He who previously knew nothing will still know nothing talk he ever so much.
Ósnotr maðr er með aldir kømr þat er bazt at hann þegi engi þat veit at hann ekki kann name hann mæli til mart veita maðr hinn er vætki veit þótt hann mæli til mart
Havamal: 27, Gestaþáttr