The ninth chapter of the Bhagavad Gita is Raja Vidya Yoga. In this chapter, Krishna explains that He is Supreme and how this material existence is created, maintained and destroyed by His Yogmaya and all beings come and go under his supervision. He reveals the Role and the Importance of Bhakti (transcendental devotional service) towards our Spiritual Awakening. In such devotion, one must live for the God, offer everything that he possesses to Him and do everything for Him only. One who follows such devotion becomes free from the bonds of this material world and unites with the Lord.
The Blessed Lord said: However, to you who are not given to cavilling I shall speak of this highest secret itself, which is Knowledge [Jnana may mean Brahman that is Consciousness, or Its knowledge gathered from the Vedas (paroksa-jnana). Vijnana is direct experience (aparoksa-jnana).] combined with experience, by realizing which you shall be free from evil.OPEN VERSE
This is the Sovereign Knowledge, the Sovereign Profundity, the best sanctifier; directly realizable, righteous, very easy to practise and imperishable.OPEN VERSE
O destroyer of foes, persons who are regardless of this Dharma (knowledge of the Self) certainly go round and round, without reaching Me, along the path of transmigration which is fraught with death.OPEN VERSE
This whole world is pervaded by Me in My unmanifest form. All beings exist in Me, but I am not contained in them!OPEN VERSE
Nor do the beings dwell in Me. Behold My Divine Yoga! I am the sustainer and originator of beings, but My Self is not contained in the beings.OPEN VERSE