Part 1
Spiritually striving to be "no one" is a trick of the mind as it seeks shelter from its own self-inflicted suffering. Seen properly, the "choice" is either to be someone defined and confined by the limitation of thought, or to be One: seeing and realizing -- without having to think about it -- that one's True Self is indefinable.
Part 2
I am in you, you are in me: There's only one... all things are Thee!