The technique of positive thinking is not a technique that transforms you. It is simply repressing the negative aspects of your personality. It is a method of choice. It cannot help awareness; it goes against awareness. Awareness is always choiceless.
RajneeshSannyas means dropping the fight with the river, going with the river, allowing the river to take you, learning the art of let-go. Those two small, simple words 'let', 'go', define the very spirit of sannyas. Then one can say 'Let thy kingdom come, thy will be done.' Then one withdraws one's will, and the moment you withdraw your will your life becomes immensely rich. Suddenly the whole is with you, and we can be victorious only when the whole is with us.
Rajneesh