Its meaning: “Still waters run smooth,” says the proverb. It means that a man of sterling qualities has no pretensions. He is a quiet, humble man.
Explanation: A person with simple and modest behavior may be a person of great learning. People cannot judge his competence with his external appearance.
However, a ripe scholar does not make a show of his learning. Unless it is sought, he does not force opinion on others.
Newton was the greatest scientist of the world. However, he spoke of himself as gathering pebbles on the seashore while the great ocean of learning lay in front of him.
A man, who knows little, becomes vain and boastful. However, the man who possesses depth of learning is humble and keeps himself in the background.