“The wise man knows when to keep silent. Only the fool tells all he knows.”
“The fool doth think he is wise, but the wise man knows himself to be a fool.”
“Even a fool is thought wise if he keeps silent, and discerning if he holds his tongue.”
“He Who Knows And Knows That He Knows Is A Wise Man - Follow Him;He Who Knows Not And Knows Not That He Knows Not Is A Fool - Shun Him”
“A fool shouts charge when he should retreat, A coward shouts retreat when he should charge and a wise man knows the difference. I charge.”
“When a wise man does not understand, he says: "I do not understand." The fool and the uncultured are ashamed of their ignorance. They remain silent when a question could bring them wisdom.”