I am aware that Plato assents to Heraclitus, who writes: “The one thing that is wise alone will not be expressed, and means the name of Zeus.” And again, “Law is to obey the will of one.” And if you wish to adduce that saying, “He that hath ears to hear, let him hear,” you will find it expressed by the Ephesian to the following effect: “Those that hear without understanding are like the deaf. The proverb witnesses against them, that when present they are absent.”