Waheguru ji ka khalsa waheguru ji ki fateh i want to clear my doubt on this topic which often comes to my mind . guru nanak is jyot and guruji has changed bodies .then why it is said dasey patshaiaan di jyot.if it was guru nanak's jyot and guru granth sahib ji has bani of 6 guru only? And it is also used there .
ਸਤਿਗੁਰਬਚਨਕਮਾਵਣੇਸਚਾਏਹੁਵੀਚਾਰੁ॥