A Gnani wears no signs it means he does not identify himself as Guru or teacher or swami or yogi.+

Swamis, yogis, and religious Gurus are nothing to do with the path of wisdom. A Gnani does that in a highly unconventional manner. He has no use for social etiquette; he has risen above worldly concerns. He is not bound by sanyasi dharma, either. He roams the earth freely like a child, like an intoxicated or like one possessed. He is the embodiment of detachment and spiritual wisdom.

Sage Sankara clearly indicates in Viveka Chudamani (2) that the Knower of the Atman (A Gnani) "bears no outward mark of a holy man" (Stanza 539).

A Gnani wears no signs, it means he does not identify himself as Guru or teacher or swami or yogi.

Sage Sankara says:~ “Though I wear these robes of a sanyasin, it is only for the sake of bread."

Thus, it proves that Sage Sri, Sankara meant, taking sanyasa and wearing the religious robes to earn bread. Sanyasa is not a qualification to acquire Self-knowledge or Brahma Gnana or Atma Gnana that is what he meant.

Thus, it means the one who were the robes is not a Gnani because he identifies himself with his birth entity and his inherited caste, sect or religion. Thus, he accepts the birth entity as the Self and the world as a reality, whereas the Self is birthless and deathless because it is formless, timeless and spaceless existence. : ~ Santthosh Kumaar