Bhagavad Gita Chapter 4 Verse 13
भगवद् गीता अध्याय 4 श्लोक 13

चातुर्वर्ण्यं मया सृष्टं गुणकर्मविभागशः।
तस्य कर्तारमपि मां विद्ध्यकर्तारमव्ययम्।।4.13।।



हिंदी अनुवाद - स्वामी रामसुख दास जी ( भगवद् गीता 4.13)
।।4.13  4.14।।मेरे द्वारा गुणों और कर्मोंके विभागपूर्वक चारों वर्णोंकी रचना की गयी है। उस(सृष्टिरचना आदि) का कर्ता होनेपर भी मुझ अव्यय परमेश्वरको तू अकर्ता जान। कारण कि कर्मोंके फलमें मेरी स्पृहा नहीं है इसलिये मुझे कर्म लिप्त नहीं करते। इस प्रकार जो मुझे तत्त्वसे जान लेता है वह भी कर्मोंसे नहीं बँधता।


English Translation of Sanskrit Commentary By Sri Shankaracharya's
4.13 Catur-varnyam-meaning the same as catvarah varnah, the four castes; srstam, have been created; maya, by Me who am God, which accords with such Vedic texts as, The Brahmanas were His face৷৷. (Rg. 10.90.12); guna-karma-vibhagasah, through a classification of the gunas and duties. [A.G. writes: guna-vibhagena karma-vibhagah, classification of the duties, determined by the classification of the gunas.-Tr] By the gunas are meant sattva, rajas and tamas (see note under 2.45; also see Chapter 14).
As to that, the control of the mind and body, austerity, etc. are the duties of the Brahmanas, who are sattvika, i.e. have a predominance of the ality of sattva (purity, goodness, etc.). Courage, valour, etc. are the duties of the Ksatriyas, in whom sattva becomes secondary and rajas (passion, attachment, etc.) preponderates. Agriculture etc. are the duties of the Vaisya, in whom tamas (indolence, ignorance, etc.) is secondary and rajas is predominant. Service is the only duty of the Sudra, in whom rajas is secondary and tamas predominates (see chapters 14, 16,17 and 18). In this way, the four castes have been created by Me through a classification of the gunas and duties. This is the idea. And these four castes do not prevail in the other worlds. Hence the specification, in the human world.
Well, in that caste, by virtues of Your being he agent of the acts of creation of the four castes,etc. You become subject tothe conseence of those actions? Therefore you are not eternally free and the eternal Lord!
This is being answered: Api, even though; I am kartaram, the agent; tasya, of that act, from the empirical standpoint of maya; still, from the highest standpoint, viddhi, know; mam, Me; to be akartaram, a non-agent; and therefore, also know Me to be avyayam, changeless, not subject to the cycle of births and deaths.
In reality, however, I am not the agent of those actions of which you think I am the agent.
Because


English Translation of Commentary  - Dr. S. Sankaranarayan
4.13 See Comment under 4.14


English Translation of Ramanuja's Sanskrit Commentary
4.13 The whole universe beginning with Brahma and ending with a cluster of grass, with the system of four stations divided according to Sattva and other Gunas and by actions like self-control corresponding to the Gunas, was created by Me. The mention of creation is for illustration. The universe is protected by Me alone and is withdrawn by Me alone. Know Me to be the creator of his manifold actions of creation etc., but at the same time to be non-agent.

Sri Krsna explains here how this is possible.


Transliteration Bhagavad Gita 4.13Chaaturvarnyam mayaa srishtam gunakarma vibhaagashah;
Tasya kartaaram api maam viddhyakartaaram avyayam.


Word Meanings Bhagavad Gita 4.13chātuḥ-varṇyam—the four categories of occupations; mayā—by me; sṛiṣhṭam—were created; guṇa—of quality; karma—and activities; vibhāgaśhaḥ—according to divisions; tasya—of that; kartāram—the creator; api—although; mām—me; viddhi—know; akartāram—non-doer; avyayam—unchangeable