Brahmsutras- The Chatuha-Sutri

Brahma-Sutras: The Chatuha Sutri

The following four opening verses of the Brahma Sutras

Convey the gist of the entire Vedanta 

Hence lauded as 

The Chatuha-Sutri

Athato Brahma Jijnaasa

Now and therefore (i.e. since the need has been felt and of-course since human life can not be lived or find its fulfilment without it, there is nothing more necessary than this) 

let us (the shaastras) discuss (quench your thirst) The Knowledge of Brahman.. (The one and Only God or Allaha) 

Janmaadi Asya Yataha

The birth etc (creation preservation and dissolution) 

everything comes about from Whom (Him) alone (and exists in Him and merges back into Him alone) and

Shaastra Yonitwaat

The shaastras (scriptures of all the lands and religions) are born out of He Himself 

(by His Will, because of His mercy and as His grace; for the sake of the entire mankind) and 

He can be understood only and only through the agency of The Shaastras... so do have faith in the shaastras, revere them, don't approach them with a view to disprove their authenticity or a vain attempt to prove your mastery over them. 

(Brahman is simply unknowable and unreachable 

even if the entire humanity with all the human faculties put together 

tries to know Him, from the beginning to the end of time
it is only through reverence and faith in the scriptures that one can just about approach the hem of His robe, even for that one requires an immense grace of His Own)

Tatt Tu Samanvayaat

He is the One and Only, 

harmonising glue of love between 

all that is (everything, everyone, every religion etc etc etc.)

He is to be understood as harmony or Yoga itself.. (for want of a better parallel lets say the gravitational force) 

(He alone is keeping all this existence held together, from microcosm to the macrocosm,

from the beginning to the end of time

and when understood and adored 

(indeed with the help of the Shaaastras coupled with His explicit grace), 

He alone brings about peace and harmony)