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Here's something you can try at home. Or on the bus, for that matter. You can do it with your eyes closed or open, in a quiet room, or a noisy street. All you have to do is this: identify yourself.
I don't mean stand up and say your name. I mean catch hold of that which is you, rather than just the things that you do or experience. To do this, focus your attention on yourself. Try to locate in your own consciousness the "I" that is you, the person who is feeling hot or cold, thinking your thoughts, hearing the sounds around you and so on. I'm not asking you to locate your feelings, sensations, and thoughts, but the person, the self, who is having them.
It should be easy. After all, what is more certain in this world than that you exist? Even if everything around you is a dream or an illusion, you must exist to have the dream, to do the hallucinating. So if you turn your mind inwards and try to become aware only of yourself, it should not take long to find it. Go on. Have a go.
Any luck?
Source: Book I of A Treatise on Human Nature by David Hume, 1739-40.
Baggini, J., The Pig That Wants to Be Eaten, 2005, p. 160.
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What do you think? Any luck? How do you think about this concept of "I"? Someone like me will be back on Friday to answer.