'Do not grieve, do not fear' — of all the Gita's promises this is the plainest, spoken to anyone willing to loosen their grip and trust.
सर्वधर्मान्परित्यज्य मामेकं शरणं व्रज।अहं त्वा सर्वपापेभ्यो मोक्षयिष्यामि मा शुचः।।18.66।।
sarva-dharmān parityajya mām ekaṁ śharaṇaṁ vraja ahaṁ tvāṁ sarva-pāpebhyo mokṣhayiṣhyāmi mā śhuchaḥ
Relinquishing all Dharmas take refuge in Me alone; I will liberate thee from all sins; grieve not.
— Swami Swarupananda