This philosophical or intellectual approach to spiritual evolution support the path of Jnana (intellect). This approach emphasizes on the 'sakshi'. This evolution describe the entire world as an illusion (maya). But through the development of the true witness (sakshi), one may come out of all these illusions and can experience the ultimate reality of the world as well as his inner.
Using the two powerful technique of Viveka (discrimination) and Vairagya (dispassion), the veils of illusions are lifted. Jnana Yoga is usually regarded as the most difficult of the four paths of yoga. This path demands a sharp mind and an unclouded intellect.