The final verse given to us from the Chinmaya Panchamrita is from chapter 18, verse 66.
सर्वधर्मान्परित्यज्य मामेकं शरणं व्रज ।
अहं त्वा सर्वपापेभ्यो मोक्षयिष्यामि मा शुचः॥ ६६॥
or, more closely
sarvadharmānparityajya māmekaṁ śaraṇaṁ vraja,
ahaṁ tvā sarvapāpebhyo mokṣayiṣyāmi mā śucaḥ
and in english, here is a word by word break down.
sarva-dharmān: sarva (all) + dharmān (duties)
parityajya: pari + tyaj: Abandoning, giving up
mām: me
ekam: alone, only
śaraṇam: shelter, refuge
vraja: go, come (to)
ahaṁ: I
tvā: you
sarva-pāpebhyaḥi: sarva (all) + pāpa (sins) + bhyaḥ
mokṣayiṣyāmi: I will liberate
mā: do not
śucaḥ: grieve, sorrow
So, this will read:
Abandoning all dharmas, shelter in Me alone
Grieve not, I will liberate them from all sins.
Perhaps more than any other verse, this verse encapsulates the essence of the Bhagavad Gita.
The assurance of Krishna, is that those who abandon their duties (dharmas), they shall be absolved of all sin.
This would seem contradictory to everything that the Gita has proposed up to this point.
Krishna has repeatedly emphasized that Arjuna must simultaneously engage in devotion while fulfilling his duties(Karma yoga) and fight.
However, here Krishna is saying that Arjuna may renounce his dharma, if he gives surrenders wholly to Krishna (karam sanyas).
Krishna is not advocating that Arjua dismiss his righteous duties as warrior, rather that he transcend these duties, and embrace the supreme dharma of unconditional surrender to the Divine.
And here, Krishna tells of His assurance, Do not fear, I shall liberate you from all sinful reactions.
Total surrender is not a doctrine for the weak. It is the strength to understand that the self(ego) is not the hightest authority, and to stop treating the path forward as project with defined outcomes.
It is the strength to realise that the ego cannot liberate itself alone.
The ego will tell you that it is the person, that it has the strength to carry you through.
What remains when the ego is stripped away, is what was always there, but could not be recognised beyond the ego.
The assurance Krishna gives is not vague.
I will liberate them from all sins.
The condition is not that the person be perfect, merely genuine.