According to the provided text, what metaphors are used to describe the greatness of the Guru?

Chapter 50 employs several powerful metaphors to convey the unfathomable greatness of the Sadguru. The chapter describes the Guru as the one who can end the cycle of birth and death. Chunk 1 of Chapter 50 refers to the Sadguru as a 'cloud of mercy,' the 'light of knowledge,' and the 'expounder of the secret of the Vedas.' Expanding on this, chunk 2 compares the Guru to 'the sun that destroys the darkness of the world' and 'the moon to the Chakor-bird of the devotee’s heart,' illustrating the Guru's role in dispelling ignorance and providing spiritual solace. The text concludes that the Guru's greatness is so immense that it is best to approach it with silent reverence.