Guru?

The mind that identifies itself as a 'Guru' to some others is not really a Guru.

The mind that identifies an external 'Guru' as its greatest Guru still hasn't found the Guru yet.

The one and only greatest Guru is the selfless mind itself.

The external Guru is anyone and anything or any experiences that enables the mind to see the one and only Guru from within (of knowing Thyself), or to see the truth of selflessness and impermanence in all and everything, where all and everything are the teachers and the teachings or Dhamma, transcending all kinds of names and forms or duality.

Be free.