|One day he
called him and said, "Son, I think you feel you have mastered all knowledge on the
face of the earth; but, have you ever learnt that knowledge, by which we can hear what is
not heard; perceive what cannot be perceived, and know what cannot be known?"
Svetaketu was a trifle upset. He asked humbly, "Sire,
wont you tell me what that knowledge is?
Seeing that his son was coming round, the father said,
"My dear, let me explain myself fully. When, for instance, you know one clod of Clay,
you can know all that is made of clay. When you know a nugget of gold, you can know all
ornaments made of gold, because the essence of it is gold. When you know a nail-cutter,
you can know all that is made of iron, the truth being that all of them are iron. The only
difference is in their names and forms. That is the knowledge I am talking about."