यावचिन्त्यावात्मास्य शक्तिश्चैतौ परमार्थो भवतः॥१॥
Yāvacintyāvātmāsya śaktiścaitau paramārtho bhavataḥ
These two (etau), the Self (ātmā) and (ca) His (asya) Power (śaktiḥ) —who (yau) (are) inconceivable (acintyau)—, constitute (bhavataḥ) the Highest Reality (parama-arthaḥ)
The Self is the Core of all, and His Power has become all. I call the Core “the Self” for the sake of bringing more light instead of more darkness. If I had called Him “Śiva”, some people might consider Him as the well-known puranic Śiva who is a great ascetic living in a cave and whose main task consists in destroying the universe, etc. Other people would think that, as Viṣṇu is greater than Śiva, he should be the Core of all and not Śiva. In turn, there is also a tendency to regard Śiva like impersonal while Viṣṇu is personal. There is no end to spiritual foolishness indeed, because there is no difference between Śiva and Viṣṇu really. Anyway, other people could suggest that a better name would be Brahman, etc. In order not to fall into all that ignorant mess of names and viewpoints, I chose to assign the name “Self” to the Core of all. In the end, when spiritual enlightenment arrives, one’s own mind is withdrawn (as I will tell by an aphorism later on), and consequently there is nobody to think about if “This Core of all” is personal, impersonal, Śiva, Viṣṇu, Brahman, etc. Ego just collapses and This that remains is the Self as He essentially is.
He and His Power are completely inconceivable, i.e. beyond the mental sphere. The Play of names, viewpoints and such is performed by His Power, which is always so frisky. All in all, the constant question is always: “Is oneself completely free like the Self?”. If the answer is “Yes”, one has accomplished the goal of life. And if the answer is “No”, one must get rid of his own bondage somehow then. The Self and His Power constitute the Highest Reality. Once you can attain them, so to speak, you are completely free like Them both. The Self and His Power are “two” only in the sphere of words, because as a matter of fact they form one compact mass of Absolute Freedom and Bliss. Just as the sun can be divided into “core of the sun, surface of the sun, crown”, etc.
तयोरुभयोः स्वरूपं स्वातन्त्र्यानन्दात्मकैकघनत्वेनापि तत्सन्तताध्ययनाय वचोविषय एव द्विधाकृतम्
Tayorubhayoḥ svarūpaṁ svātantryānandātmakaikaghanatvenāpi tatsantatādhyayanāya vacoviṣaya eva dvidhākṛtam
Even though (api) the essential nature (sva-rūpam) of Them (tayoḥ) both (ubhayoḥ) (is) one compact mass (eka-ghanatvena) composed of (ātmaka) Absolute Freedom (svātantrya)(and) Bliss (ānanda), it is divided into two (dvidhā-kṛtam) —only (eva) in the sphere (viṣaye) of words (vacas)— for its close study (tad-santata-adhyayanāya)
The Self is Absolute Freedom and His Power is Bliss. Both form a compact mass (i.e. omnipresent). In other words, the Highest Reality is always “One without a second”, but, in the world of words It is divided into two for studying It in detail. When this division occurs, the act of coming to recognize or realize the Highest Reality is made easier. So, the very Highest Reality generates this division in the sphere of words as a help for the spiritual aspirants to realize It faster.
आत्मा प्रकाशात्मकशुद्धबोधोऽपि सोऽहमिति वचोविषये स्मृतः
Ātmā prakāśātmakaśuddhabodho’pi so’hamiti vacoviṣaye smṛtaḥ
Although (api) the Self (ātmā) (is) pure (śuddha) Consciousness (bodhaḥ) consisting of (ātmaka) Prakāśa or Light (prakāśa), He (saḥ) is called (smṛtaḥ) “I” (aham iti) in the sphere (viṣaye) of words (vacas)
The Self is pure Consciousness, viz. the Supreme Subject who is never an object. Therefore, He cannot be perceived in the form of “this” or “that”. He cannot even be delineated in thought by any means. Anyway, in the world of words, He is called “I” or also “real I” for the sake of showing that He is higher than the false “I” or ego.
AltExploit 
Killer. ;))