Who is careful in his growth, notices that he needs two kind of food. One of them is for body breeding and the other one for soul breeding.
And there are particular mouths for each one.
The first one is mouth and the second one is ear. They can’t take each other’s place.
Water is the ideogram of wisdom. And body is the ideogram of soul.
The thirsty body wants water and the thirsty soul wants wisdom.