Self-identification with the outer causes is suffering

M: On the other hand, self-identification with the outer causes is suffering.
Q. How does self-identification happen?
M: The self by its nature knows itself only. For lack of experience whatever it perceives it takes to be itself. Battered, it learns to look out (viveka) and to live alone (vairagya). When right behaviour (uparati), becomes normal, a powerful inner urge (mukmukshutva) makes it seek its source. The candle of the body is lighted and all becomes clear and bright.