Bhagavad Gita Verse 54, Chapter 11

bhaktyaa tvananyayaa shakya ahamevamvidhorjuna |
jnyaatum drishtum cha tattvena praveshtum cha parantapa || 54 ||
 
But, by single-pointed devotion, I am accessible, O Arjuna. In this manner, as my essence, I can be known, seen, and merged into, O scorcher of foes.
 
bhaktyaa : devotion
tu : but
ananyayaa : single-pointed
shakyaha : accessible
aham : I
evam : this
vidhihi : manner
arjuna : O Arjuna
jnyaatum : known
drishtum : seen
cha : and
tattvena : essence
praveshtum : merged
cha : and
parantapa : O scorcher of foes
 
So finally, Shri Krishna reveals the means by which we can access Ishvara’s cosmic form. It cannot be through any action such as rituals, study of the Vedas and so on since all of these methods are in the realm of space and time. “Ananya bhakti”, or single-pointed devotion is the only means to access Ishvara. We have come across the term “ananya” in prior chapters. It means that in which there is no “anya”, no other. We should not be devoted to Ishvara so that we can get something else. The devotion should be for obtaining Ishvara and nothing else.
 
We see this principle in our daily life as well. You have two friends, one who always comes to you when he needs something from you, not otherwise. Another friend comes to you just to know how you are doing, without any ulterior motive or hidden agenda. We would always prefer to deal with the second friend, and say to him "my house is your house, don't behave like a stranger, take what you want". Similarly, when we ask something materialistic from Ishvara, we treat him as different from us. Ishvara does not like this. When we want only Ishvara, we do not treat him as different from us. This is the crux of single-pointed devotion.
 
In the second half of the shloka, Shri Krishna outlines the process of attaining Ishvara. First, we have to know what Ishvara is, discarding all our prior notions. We have to know him as “tattvena”, in his essence, as pervading the entire world, not as someone hiding up in the sky somewhere. When we gain this knowledge and reflect upon it constantly, we begin to see Ishvara in everything, and everything as Ishvara. But the last step, of not seeing Ishvara from the outside, but of totally merging into Ishvara, can only happen through single-pointed devotion. Arjuna came to know Ishvara through Shri Krishna’s teaching, and he also saw Ishvara’s cosmic form. But he did not fully merge into it, he was standing out of it.
 
In this manner, Shri Krishna slowly brings up the topic of the next chapter, which is the yoga of bhakti or devotion. He summarizes this chapter in the next and last shloka.

Bhagavad Gita Verse 22, Chapter 8

purushaha sa paraha paartha bhaktyaa labhyastvananyayaa |
yasyaantahasthaani bhootaani yena sarvamidam tatam || 22 ||
 
That supreme person, in whom all beings are included, by whom all this is pervaded, O Paartha, is obtained through single-pointed devotion.
 
purushaha : person
saha : that
paraha : supreme
paartha : O Paartha
bhaktyaa : with devotion
labhyaha : obtained
ananyayaa : single pointed
yasya : in whom
antahasthaani : are included
bhootaani : all beings
yena : by whom
sarvam : all
idam : this
tatam : pervaded
 
With this shloka, Shri Krishna summarizes the topic of liberation. The detail around the creation and dissolution of the universe was meant to highlight the notion that only through liberation can we rise above that endless cycle. Shri Krishna gives us the means for liberation as well as the attributes of the goal which is Ishvara.
 
Shri Krishna says that liberation is obtained through single-pointed devotion to Ishvara. Single-pointed devotion was covered in chapter six. However, here it is meant to include not just devotion but also karma yoga. If the karma yoga aspect is missing, our vaasanaas or latent desires will remain unfulfilled, pulling us back into the cycle of rebirth so that they will be fulfilled.
 
Now, what is Ishvara’s connection to creation and dissolution? Ultimately, Ishvara is the cause of all creation. But he is not someone who stands outside his creation. The classic example referenced in this context is that of the potter and the pot. The potter creates the pot out of clay, but remains outside the pot, distinct from the pot. Ishvara is not like that. He is like the ocean that creates waves. The waves are pervaded by the ocean and are also included in the ocean. So is the case with Ishvara. Therefore, Ishvara is everywhere (beyond space) and ever present (beyond time).
 
Having conclude the topic of liberation, Shri Krishna begins the last topic of this chapter in the next shloka. He describes the two paths that seekers have to travel through after they pass away.