All the saints know that the Guru is the true gem. He can turn iron into gold, O great sage.

Kabir suggests that all true saints understand the Guru's profound power, likening him to a 'Parash stone.' This metaphor emphasizes that the Guru has the power to transform the base (iron) into the precious (gold). This transformation isn't just physical; it speaks to the spiritual alchemy of knowledge, where the Guru purifies the impure heart and mind, enabling true enlightenment. It is a testament to the immense, divine grace of the teacher.