Gītārtha Saṃgraha verse 3

madhyame bhagavattattva yāthātmyāvāpti siddhaye |
jñāna karmābhinirvartyo bhaktiyogaḥ prakārtitaḥ ||

tattva - principle; thatnesssiddhi - accomplishment, performance, fulfilment, attainment, successjñāna - knowing; knowledge; higher knowledgekarman - act, action, performance; work, labour, activity; any religious act or rite; organ of sensebhakti - devotion

Commentaries and Reflections

Commentary by TKV Desikachar:

Devotion is the basis for seeing the truth.
This truth is, the Lord.
But devotion must grow from following ones duty
in a spirit of selflessness and search.”

Commentary by Paul Harvey:

Overview to the Gītārtha Saṃgraha of Yāmunācārya