The traditional view of adweta vedant is called shabda prokshawade. Shab da prokshawada means direct enlightenment from words, from a sentence. How the tenth man story, you recall how it works. Their sentence was used twice. So that sentence gave indirect knowledge. And in the open ishads you have many such sentences. Satyam gana manantam, bramha. Brahman is infinite existence, consciousness, still indirect. These are all sentences which give you direct knowledge. If it works, if you understand for understanding all this what we did little while ago, the whole process of analysis, analysis of the great sentence. This
Sage Uddalaka asks his son Svetaketu: What is that knowledge by which we hear the unhearable, perceive what cannot be perceived and know what cannot be known? Inspired from this story from the Chandogya Upanishad, Swami Sarvapriyananda teaches the great saying (mahavakya) - Tat Tvam Asi (That Thou Art).
This discourse is also inspired from a verse from the Brihadharanyaka Upanishad (Mantra 4.4.12) as taught in the book, Pancadasi by Vidyaranya: "If a man knows the Self as ‘I am this,’ then desiring what and for whose sake will he suffer in the wake of the body?"
Mantra 4.4.12:
आत्मानं चेद्विजानीयादयमस्मीति पूरुषः ।
किमिच्छन्कस्य कामाय शरीरमनुसंज्वरेत् ॥ १२