The master said to the disciple, after a series of lessons for the day (in those days they used to teach in very practical ways), "Bring me a vessel of water." So he brings the vessel of water. "Bring me a lump of rock salt." --Salt, in those days, used to come in rock form and you used to break it and grind it. So he brought the rock salt. He said, "Put it in the water." So he put it in the water. "Now go, it's evening. Now rest. Come back for the lesson tomorrow." He came back for the lesson the next morning. "Oh son, that salt rock I asked you to place somewhere last night, bring me that." So the disciple goes, and looks, finds nothing, says, "Master I don't know what happened. I suppose it disappeared somewhere." So the master says, "All right, bring the vessel." So he brings the vessel. "Sip from one end of the vessel." He sipped. "How is it?" "Salty." "Taste it from the middle. How is it?" "Salty." "Taste it from the other end also. He tasted it. "How is it?" "It's salty!" He said, "Just as the salt has not ceased to exist, but has taken a subtler form, permeated every molecule, every drop of water, it is there, but what you could not see with your sense of vision, you can taste with your sense of flavor, there are things you can not experience with any of your five senses. That does not mean that they are not there. You just don't have the sense for experiencing them, because the senses cease their journey at that point. That is the Spirit, the Self, dwelling in the entire universe. That is the Truth. That is the Reality, son. Tat tvam asi. Thou art that.