Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Moksha-Sanyasa Yoga Chapter 18, Verse 18.55.
Sanskrit
भक्त्या मामभिजानाति यावान्यश्चास्मि तत्त्वतः । ततो मां तत्त्वतो ज्ञात्वा विशते तदनन्तरम् ॥ १८.५५ ॥
Hindi
उस परा भक्त्ति के द्वारा वह मुझ परमात्मा को, मैं जो हूँ और जितना हूँ, ठीक वैसा का वैसा तत्त्व से जान लेता है ; तथा उस भक्त्ति से मुझको तत्त्व से जान कर तत्काल ही मुझ में प्रविष्ट हो जाता है ।
English
One can only fully understand Me, the Supreme Spirit, as I truly am, by pouring out his pure love and devotion to Me. When this being has truly realized and understood Me, in the end, he enters into and becomes a part of Me, the Supreme Soul.