According to Osho, 'birth,' 'death,' and 'life' describe the ego’s cycle: the ego’s birth is suffering, its life is suffering, and its death is suffering—because only the false is born and dies. The soul is unborn, undying, and its life is blissful witnessing. Drop the I-sense (ego), enter nirvana, and truth radiates bliss.
Life hurts when you cling to the little 'me,' and it becomes joyful when you rest as the quiet watcher that was never born and never dies.