The seventh chapter of the Bhagavad Gita is Gyaan Vigyana Yoga . In this chapter, Krishna reveals that he is the Supreme Truth, the principal cause and the sustaining force of everything. He reveals his illusionary energy in this material world called Maya, which is very difficult to overcome but those who surrender their minds unto Him attain Him easily. He also describes the four types of people who surrender to Him in devotion and the four kinds that don't. Krishna confirms that He is the Ultimate Reality and those who realize this Truth reach the pinnacle of spiritual realization and unite with the Lord.
The Supreme Lord said: Now listen, O Arjun, how, with the mind attached exclusively to me, and surrendering to me through the practice of bhakti yog, you can know me completely, free from doubt.OPEN VERSE
I shall now reveal unto you fully this knowledge and wisdom, knowing which nothing else remains to be known in this world.OPEN VERSE
Amongst thousands of persons, hardly one strives for perfection; and amongst those who have achieved perfection, hardly one knows me in truth.OPEN VERSE
Earth, water, fire, air, space, mind, intellect, and ego—these are eight components of my material energy.OPEN VERSE
Such is my inferior energy. But beyond it, O mighty-armed Arjun, I have a superior energy. This is the jīva śhakti (the soul energy), which comprises the embodied souls who are the basis of life in this world.OPEN VERSE