Bhagavad Gita Chapter 18, Verse 55

भक्त्या मामभिजानाति यावान्यश्चास्मि तत्त्वतः | ततो मां तत्त्वतो ज्ञात्वा विशते तदनन्तरम् ||

bhaktyā mām abhijānāti yāvān yaś cāsmi tattvataḥ tato māṁ tattvato jñātvā viśate tad-anantaram

Through devotion, one knows Me in truth, who I am and how great I am. Then, having known Me in truth, one enters into Me immediately after.

Krishna reveals the power of devotion. 'Bhaktyā mām abhijānāti yāvān yaś cāsmi tattvataḥ'—through devotion (bhaktyā), one knows (abhijānāti) Me (mām) in truth (tattvataḥ), who I am (yaḥ cāsmi) and how great I am (yāvān). 'Tato māṁ tattvato jñātvā viśate tad-anantaram'—then (tataḥ), having known (jñātvā) Me (mām) in truth (tattvataḥ), one enters (viśate) into Me immediately after (tad-anantaram). This is the key teaching: devotion is the direct path to knowing Krishna in truth. Through devotion, you come to know who Krishna really is and how great He is. And once you know Him in truth, you enter into Him—you attain union with the Supreme. This is the path: devotion → knowledge → union. Devotion leads to true knowledge, and true knowledge leads to union with the Supreme.