Empty Your Cup

We all heard about the ~empty your cup~ metaphor, but this text I found made it so crystal clear to me that I thought it might help others as well to get to the bottom of it:

 ~I see only the past~

“Look at a cup, for example.

Do you see a cup, or are you merely reviewing your past experiences of picking up a cup, being thirsty, drinking from a cup, feeling the rim of a cup against your lips, having breakfast and so on? Are not your aesthetic reactions to the cup, too, based on past experiences? How else would you know whether or not this kind of cup will break if you drop it? What do you know about this cup except what you learned in the past? You would have no idea what this cup is except for your past learning. Do you, then, really see it?” (A Course in Miracles)