Loving is the only sure road out of darkness, the only serum known that cures self-centeredness.
Thinking more than others about our own thoughts is not self-centeredness.
It means that if asked what's on our mind, we are less likely to mention being aware of the world around us, and more likely to mention our inner reflections. But we are less likely to mention thinking about other people.
Nationalism is a form of cultural self-centeredness, and as a collective thought-form, can only exist because the dominant in-group is itself comprised of self-centered and narcissistic individuals.
Self-awareness is not self-centeredness, and spirituality is not narcissism.
'Know thyself' is not a narcissistic pursuit.