guru granth sahib is the only truth and those preten to be living gurus are just idots and i will like to tell every body that bani is the truth every thing else is a lie. with out guru granth sahib we are totaly lost as guru explain in ramlaki mahala 3 verse 22
Whosoever deserts the Guru, will never obtain salvation without the True Guru.
You may inquire from wise saints, they will tell you that such a person will never obtain salvation elsewhere.
He shall wander in many births and deaths and will not obtain Salvation without the True Guru.
However he may subsequently obtain Salvation, by attaching himself with the feet (obeying the instructions) of the True Guru, who will infuse in him the Word.
Nanak says reflect carefully on this matter; there can be no Salvation without the True Guru. (22)