In chapter four Lord Krishna reveals how spiritual knowledge is received by disciplic succession and the reason and nature of His descent into the material worlds. Here He also explains the paths of action and knowledge as well as the wisdom regarding the supreme knowledge which results at the culmination of the two paths. Thus this chapter is entitled: Approaching the Ultimate Truth. Chapter 4, Verse 1
The Blessed Lord said: I instructed this imperishable science of yoga to the sun-god, Vivasvan, and Vivasvan instructed it to Manu, the father of mankind, and Manu in turn instructed it to Iksvaku.

Chapter 4, Verse 2
This supreme science was thus received through the chain of disciplic succession, and the saintly kings understood it in that way. But in course of time the succession was broken, and therefore the science as it is appears to be lost.

Chapter 4, Verse 3
That very ancient science of the relationship with the Supreme is today told by Me to you because you are My devotee as well as My friend; therefore you can understand the transcendental mystery of this science.

Chapter 4, Verse 4
Arjuna said: The sun-god Vivasvan is senior by birth to You. How am I to understand that in the beginning You instructed this science to him?

Chapter 4, Verse 5
The Blessed Lord said: Many, many births both you and I have passed. I can remember all of them, but you cannot, O subduer of the enemy!

Chapter 4, Verse 6
Although I am unborn and My transcendental body never deteriorates, and although I am the Lord of all sentient beings, I still appear in every millennium in My original transcendental form.

Chapter 4, Verse 7
Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion—at that time I descend Myself.

Chapter 4, Verse 8
In order to deliver the pious and to annihilate the miscreants, as well as to reestablish the principles of religion, I advent Myself millennium after millennium.

Chapter 4, Verse 9
One who knows the transcendental nature of My appearance and activities does not, upon leaving the body, take his birth again in this material world, but attains My eternal abode, O Arjuna.

Chapter 4, Verse 10
Being freed from attachment, fear and anger, being fully absorbed in Me and taking refuge in Me, many, many persons in the past became purifled by knowledge of Me—and thus they all attained transcendental love for Me.