Verse
भक्त्या मामभिजानाति यावान्यश्चास्मि तत्त्वतः ।ततो मां तत्त्वतो ज्ञात्वा विशते तदनन्तरम् ॥
By devotion he comes to know Me, who and how much I am and in all the reality and principles of My being; having thus known Me he entereth into That (Purushottama).
Gītā 18·55