The nature of ego and its viṣaya-vāsanās and how to eradicate them

A friend wrote to me about an experience that happened to him one evening in a particular set of circumstances:

As I was walking home, my mind suddenly entered into a very quiet state. The rate of new thoughts arising became very slow, and I found that with only a tiny amount of effort, I could just remain in the quiet space without verbal thoughts.

Self-investigation is not a matter of one ‘I’ looking for another ‘I’

A friend wrote to me recently asking, ‘When I try to look within for “I”, I am unable to find it or its source. What is my mistake and how should I practice vichara correctly?’, in reply to which I wrote: