7
Knowledge as Faith in Guru and Surrender to Kṛṣṇa
In the Fourth Chapter of  Bhagavad-gītā  Śrī Kṛṣṇa concludes that of all sacrifices, the best is the acquisition of knowledge.
śreyān dravyamayād yajñāj jñāna-yajñaḥ parantapa sarvaṁ karmākhilaṁ pārtha jñāne parisamāpyate
“O chastiser of the enemy, the sacrifice of knowledge is greater than the sacrifice of material possessions. O son of Pṛthā, after all, the sacrifice of work culminates in transcendental knowledge.” (Bg. 4.33)
Knowledge is the best sacrifice because this conditional life is due to ignorance. The purpose of sacrifice, penance,  yoga  and philosophical discussion is to acquire knowledge. There are three stages of transcendental knowledge by which one realizes the impersonal aspect of God (Brahman realization), the localized aspect of God within the heart and within every atom (Paramātmā or Supersoul realization) and the realization of the Supreme Personality of Godhead (Bhagavān realization). But the very first step in acquiring knowledge is coming to understand that “I am not this body. I am spirit soul, and my aim of life is to get out of this material entanglement.” The point is that whatever sacrifice we make is intended to enable us to come to the point of real knowledge. The highest perfection of knowledge