अयतिः श्रद्धयोपेतो योगाच्चलितमानसः। अप्राप्य योगसंसिद्धिं कां गतिं कृष्ण गच्छति ॥

ayatiḥ śhraddhayopeto yogāch chalita-mānasaḥ aprāpya yoga-sansiddhiṁ kāṅ gatiṁ kṛiṣhṇa gachchhati

He who is unsubdued but who possesseth faith, with the mind wandering away from yoga, failing to attain perfection in yoga, what path doth he tread, O Krishna?

In plain words: Arjuna asks about a person who has faith but lacks self-control, whose mind wanders away from yoga so they never reach the goal. What happens to that person?