18.68-72 Ya idam etc. upto Dhananjaya. The very act of explaining this among My devotees is itself an act of cultivating devotion towards Me.  Whosoever shall declare etc :  Whosoever directs the mind [of the devotees] by face to face method, following the best procedure prescribed in the scriptures; i.e., he who shall impart  [this knowledge] - he becomes one with Me.  This is an injunction  [concerning the result]  and not a sentence of praise.  Likewise is  [the case] in other places also.