By self-knowledge I mean full knowledge of what you are not

Maharaj: As long as there is the body and the sense of identity with the body, frustration is inevitable. Only when you know yourself as entirely alien to and different from the body, will you find respite from the mixture of fear and craving inseparable from the 'I-am-the-body' idea. Merely assuaging fears and satisfying desires will not remove this sense of emptiness you are trying to
escape from; only self-knowledge can help you. By self-knowledge I mean full knowledge of what you are not.