य इदं परमं गुह्यं मद्भक्तेष्वभिधास्यति |
भक्तिं मयि परां कृत्वा मामेवैष्यत्यसंशय:

ya idaṁ paramaṁ guhyaṁ mad-bhakteṣhv abhidhāsyati
bhaktiṁ mayi parāṁ kṛitvā mām evaiṣhyaty asanśhayaḥ



जो पुरुष मुझमें परम प्रेम करके इस परम रहस्ययुक्त गीताशास्त्र को मेरे भक्तों में कहेगा, वह मुझको ही प्राप्त होगा- इसमें कोई संदेह नहीं है॥68॥


Those, who teach this most confidential knowledge amongst my devotees, perform the greatest act of love. They will come to me without doubt.


English Translation Of Sri Shankaracharya’s Sanskrit Commentary By Swami Gambirananda

18.68 Yah, he who; abhi-dhasyati, will speak of, i.e., will present with the help of the text and its meaning, as I have done to you; imam, this; paramam, highest-that which has Liberation as its purpose; guhyam, secret, as spoken of above-(i.e.) the text in the form of a conversation between Kesava and Arjuna; madbhaktesu, to My devotees-. How will present? This is being stated: Krtva, entertaining; param, supreme; bhaktim, devotion; mayi, to Me, i.e., entertainting an idea thus-‘A service is being rendered by me to the Lord who is the supreme Teacher’-. Tho him comes this result: esyati, he will reach; mam, Me; eva, alone. He is certainly freed. No doubt should be entertained in this regard.
By the repetition of (the word) bhakti (devotion) [In the word madbhaktesu.], it is understood that one becomes fit for being taught (this) Scripture by virtue of devotion alone to Him.