Gītārtha Saṃgraha verse 4

pradhāna-puruṣa-vyakta-sarva-īśvara-vivecanam |
karma-dhīr-bhaktir-iti-ādiḥ pūrva-śeṣa-antima-uditaḥ ||

“The last six chapters present the
three fundamental entities:
Prakṛti, Puruṣa and Īśvara.
What is most vital to a person
for everlasting happiness is to
understand the nature of consciousness
and the Lord and his creation.”

pradhāna - the principal or first, chief, head of, prime, major; the most important or essential part; unevolved or root of matter, original source; the creative principle of naturepuruṣa - animating principle, self, consciousness, spirit; a person, man, a human being; peoplevyakta - caused to appear, manifested, apparent, visible, evidentsarva - whole, entire, all, every one; altogether, wholly, completely, in all parts, everywhereīśvara - personal god; the supreme soul; the supreme being; special self; god; lord; master, prince, king, mistress, queen; ruler of choicesvivecana - the act of discrimination, discriminating or distinguishing, reality, the making a distinction; investigation, judgment, decisionkarman - act, action, performance; work, labour, activity; any religious act or rite; organ of sensedhī - understanding, intelligence, wisdom; to perceive, think, reflect; religious thought, reflection, meditation, devotion, prayerbhakti - attachment, devotion; fondness for, devotion to, trust, homage, worship, piety, faith or love or devotion (as a religious principle or means of salvation, together with karma, ‘works’, and jñāna, ‘spiritual knowledge'.iti - thus; in this manner; something that has been said or thought; having so saidādhi - beginning from; initial; and so onpūrva - eastward, to the east of; in front, before; former, prior, preceding, previous to, earlier thanśeṣa - remainder, that which remains or is left, leavings, residue, surplus, balance, the restantima - immediately following; final, ultimate, lastudita - uprisen, risen, ascended; spoken to, addressed; communicated, proclaimed, declared; taught, handed down

Commentaries and Reflections

Commentary by TKV Desikachar:

“The last six chapters present the
three fundamental entities:
Prakṛti, Puruṣa and Īśvara.
What is most vital to a person
for everlasting happiness is to
understand the nature of consciousness
and the Lord and his creation.”
– TKV Desikachar on Gītārtha Saṃgraha of Śrī Yāmunācārya Śloka Four

Commentary by Paul Harvey: