Jnana Yoga aims at liberating soul from illusionary world by the realization of the oneness of the individual self (Atman) and the ultimate Self (Brahman).
Jnana yoga has four pillers viz. Viveka (discrimination between self and non-self), Vairagya (detachment from worldly objects), Shad-Sampat (sixfold qualities of perfection i.e. Sama - peace, Dama - control over senses, Uparati - satiety, Titiksha - forbearance, Sraddha - faith and Samadhana - concentration of mind.) and Mumukshutva (intense longing for liberation).
Bhagwat Geeta has lucidly explained the characteristics of a muni or a wise man as under:
Pillers of Jnana Yoga
Who is wise?
Bhagwat Geeta has explained the qualities of a wise person as under:
Manifestations of Wisdom
When this knowledge comes; it will come, as it were, in seven grades, one after the other. The signs of getting near truth are as under: