2nd Aphorism of the Brahma Sutras

Janmadhyasya Yatah

Janmadi ( birth or origination etc) asya ( of this world) yahat ( from where)

The second Aphorism of the Brahma Sutras says- That from where the birth and death (origination, sustenance and dissolution) of this world happens.

This 2nd sutra or Aphorism is considered to be the definition of Brahman. In the first sutra, the inquiry into the Self had began. But, then, it becomes necessary for an aspirant to know the characteristic of the one who is to be known or realized. Thus, Brahman is that from where we come, live and dissolute into. It is our past, present and future and thus the most important knowledge to be known. We see a similar echo of this sutra in the Taitiriya Upanishads -
" Yato Va Imani Bhutani Jayante. Yena Jatani Jivanti. Yat Prayantyabhi Samvishanti" - that from where the world has originated. That in which the world lives. That in which it dissolves is the Self or Brahman.

But, the question is- in the first sutras when an inquiry had been made about Brahman, why didn't the next aphorism talk about the means to attain that Knowledge. Instead we see that, there is a direct reference of that which is non perceivable or beyond all comprehensions. The answer to my mind might be thus-

There are two aspects of spiritual world. One the means and the other the end. Almost all the aspirant are been trained to follow the means to attain the end. The mandatory practices such as meditation, self analysis and the like. But, it is the Consciousness ( which comes out of constant perception) of the Self which the easiest, fastest and surest way to attain Self Knowledge and hence Liberation. Thus, with this second sutra, there is attempt to boost the endeavor of the aspirant so as to the real nature becomes clearer. We are the Self, the source of all sentient and insentient, ever unattached from all phenomena of Maya and its effect ignorance. Astavakra thus sings-- " Viswam sfurati yatredam taranga iva sagare....." 15.7