The Paradox of the Ego

When there is an "I" that looks at itself and says "mine" then questions of where worlds and heads reside go from being jokes to questions of metaphyisical immediacy.

"'I' you say, and you are proud of the word. But greater is that in which you do not wish to have faith-- your body and its great reason: that does not say 'I,' but does 'I'"
Nietzsche

Before one gets to the paradox of idealism, it may be fruitful to consider when and why the head stepped out of my head and said "I" in bold defiance!