now the heavy burden of that inevitable fate hung unpleasantly around his neck , made all the worse by the fact that he would soon be unaware of it ; the poison , when finally released from its glass encasing , would find his brain and free his mind , rob his self and raze his past , making him forget all that he had learnt and sending him into temporary , blissful ignorance , only to rudely pull him out of it at some indeterminate point in his personal future and bring about his end .