For one who explains this supreme secret to the devotees ,PURE DEVOTIONAL SERVICE IS GUAREENTED , AND AT THE END HE WILL COME BACK TO ME . BAGAVAD GITA CHAPTER 18 , VERSE 68 . 
For one who explains this supreme secret to the devotees ,PURE DEVOTIONAL SERVICE IS GUAREENTED , AND AT THE END HE WILL COME BACK TO ME . BAGAVAD GITA CHAPTER 18 , VERSE 68 .