Chapter 4 mentions that the Vedas resorted to saying 'Neti-Neti'. What does this mean in the context of describing the Supreme Divinity identified as Sai?

In Chapter 4, the phrase 'Neti-Neti,' meaning 'Not this, Not this,' signifies the inability of language and intellect to fully comprehend or describe the Supreme Divinity, who is identified as Sai. The chapter explains that the four levels of speech get tired of trying to describe Him. The Vedas, in their profound wisdom, recognized this limitation. Instead of providing a positive definition, which would inadvertently limit the limitless, they used negation. By saying 'Not this, Not this,' the Vedas indicate that God is beyond all conceivable attributes, forms, and descriptions that exist within the mortal world, pointing to a reality that is eternal, non-dual, and transcendent.