Bhagavad Gita · Gunatraya Vibhaga YogaChapter 14, Shloka 26 (14.26)

Shankaracharya. māṃ ca īśvaraṃ nārāyaṇaṃ sarvabhūtahṛdayāśritaṃ yo yatiḥ karmī vā — of Narayana, who dwells in the hearts of all beings — whether one is a renunciate or a person of action — avyabhicāreṇa na kadācid yo vyabhicarati bhaktiyogena — with a yoga of devotion that never wavers.

Acharya Ramanuja — why devotion? nānyaṃ guṇebhyaḥ kartāram … prakṛtyātmavivekānusaṃdhānamātreṇa na guṇātyayaḥ saṃpatsyate, tasya anādikālapravṛttaviparītavāsanābādhyatvasaṃbhavāt — the gunas will not be overcome by discernment between prakriti and the self alone, because contrary tendencies (vasanas) running from beginningless time may obstruct it; therefore māṃ satyasaṃkalpaṃ paramakāruṇikam — devotion to the Lord, whose will is always true and who is supremely compassionate.

Shridhara Swami. ca-śabdo 'vadhāraṇārthaḥ — "cha" here has the sense of "alone": mām eva … avyabhicāreṇaikāntabhaktiyogena — Me alone, with the yoga of single-minded devotion.

Madhusudana Saraswati. Unwavering devotion = paramapremalakṣaṇena bhaktiyogena dvādaśādhyāyoktena — of the nature of supreme love, as described in chapter 12; and the conclusion: sarvadā bhagavaccintanam eva guṇātītatvopāya — constant remembrance of the Lord is itself the means of going beyond the gunas.

Madhvacharya. His own reading of "brahmabhuya": bhagavatpriyatvaṃ brahmabhūyam — being dear to the Lord; na tu tāvatpriyatvaṃ kintu priyatvamātram — not to the same degree (as Lakshmi), simply being dear.