The Yoga of Liberation by Renunciation

Krishna gives both assurance and warning. 'Maccittaḥ sarvadurgāṇi mat-prasādāt tariṣyasi'—with your mind fixed on Me (mat-cittaḥ), you will cross (tariṣyasi) all obstacles (sarva-durgāṇi) by My grace (mat-prasādāt). 'Atha cet tvam ahaṅkārān na śroṣyasi vinaṅkṣyasi'—but if (atha cet), from ego (ahaṅkārāt), you do not listen (na śroṣyasi), you will perish (vinaṅkṣyasi). This is the key teaching: if you keep your mind fixed on Krishna, you will overcome all obstacles by His grace. But if you act from ego and don't listen to His instructions, you will perish. This emphasizes the importance of surrender and listening to the Supreme, versus acting from ego and ignoring His guidance.