The Yoga of Liberation by Renunciation

This verse asks about understanding: has this been heard by you with one-pointed mind (kaccid etac chṛutaṁ pārtha tvayāikāgra-cittena)? And has your delusion of ignorance been destroyed, O Dhananjaya (kaccid ajñāna-saṁmohaḥ praṇaṣṭas te dhanaṁjaya)? This is Krishna's question to Arjuna: have you heard this teaching with focused attention, and has your delusion been destroyed? This is a check on understanding—Krishna wants to know if Arjuna has truly understood and if his confusion has been cleared. This reveals the importance of focused listening and the removal of delusion. When you understand this, you realize: you don't need to just hear the teaching casually. You can hear it with one-pointed mind, and ensure your delusion is destroyed. This is the path: focused hearing and removal of delusion lead to true understanding.