Who is the 'Lord of the Universe' mentioned, and what actions must a devotee perform for Him to reveal Himself?

Chapter 37 describes how a devotee can prompt the Lord of the Universe to reveal Himself. The path to seeing Him is detailed through a series of devotional acts. A devotee should apply the sandalwood paste of pure love to His forehead, clothe Him in the yellow silk of devotion, and prepare a throne of firm faith decorated with divine emotions. The text further instructs the devotee to bathe Him with tears of joy, bind the waistband of devotion around His waist, and sacrifice their all with love before performing the Arati. When these acts are done, He will manifest instantly, well-pleased.