According to Osho, he has no single approach: both affirmation and negation are valid, equal paths to the same goal. The path is secondary; the primacy is the disciple's temperament and the ultimate goal. Choose the approach that fits your mind - positive or negative. Existence is polar, like male and female; a truly world-comprehensive spirituality embraces all approaches.
Both yes and no can take you home - pick the road that suits your nature; you matter more than the method.