Bhagavad Gita
1.47

इति श्रीमद्भगवद्गीतासूपनिषत्सु ब्रह्मविद्यायां योगशास्त्रे श्रीकृष्णार्जुनसंवादे अर्जुनविषादयोगो नाम प्रथमोऽध्यायः ||

iti śrīmad-bhagavad-gītāsūpaniṣatsu brahma-vidyāyāṁ yoga-śāstre śrī-kṛṣṇārjuna-saṁvāde arjuna-viṣāda-yogo nāma prathamo'dhyāyaḥ

Translation

Thus ends the first chapter, titled 'Arjuna Vishada Yoga — The Yoga of Arjuna's Lamentation,' in the Upanishad known as the Bhagavad Gita, the scripture of yoga, in the dialogue between Sri Krishna and Arjuna.

Interpretation

The colophon calls this a 'yoga' — the Yoga of Grief. That grief can be a yoga (a path to union with the divine) suggests that Arjuna's crisis is not a failure but a necessary beginning. His breakdown is the doorway through which Krishna's teaching can enter. Without the wound, there is no healing; without the question, there is no answer.