य इमं परमं गुह्यं मद्भक्तेष्वभिधास्यति । भक्तिं मयि परां कृत्वा मामेवैष्यत्यसंशयः ॥६८॥
ya idaḿ paramaḿ guhyaḿ mad-bhakteṣv abhidhāsyati bhaktiḿ mayi parāḿ kṛtvā mām evaiṣyaty asaḿśayaḥ
yaḥ — anyone who; idam — this; paramam — most; guhyam — confidential secret; mat — of Mine; bhakteṣu — amongst devotees; abhidhāsyati — explains; bhaktim — devotional service; mayi — unto Me; parām — transcendental; kṛtvā — doing; mām — unto Me; eva — certainly; eṣyati — comes; asaṁśayaḥ — without doubt.
Those, who teach this most confidential knowledge amongst my devotees, perform the greatest act of love. They will come to me without doubt.
Generally it is advised that Bhagavad-gītā be discussed amongst the devotees only, for those who are not devotees will understand neither Kṛṣṇa nor Bhagavad-gītā. Those who do not accept Kṛṣṇa as He is and Bhagavad-gītā as it is should not try to explain Bhagavad-gītā whimsically and become offenders. Bhagavad-gītā should be explained to persons who are ready to accept Kṛṣṇa as the Supreme Personality of Godhead. It is a subject matter for the devotees only and not for philosophical speculators. Anyone, however, who tries sincerely to present Bhagavad-gītā as it is will advance in devotional activities and reach the pure devotional state of life. As a result of such pure devotion, he is sure to go back home, back to Godhead.