शमो दमस्तप: शौचं क्षान्तिरार्जवमेव च |

ज्ञानं विज्ञानमास्तिक्यं ब्रह्मकर्म स्वभावजम् ||

śhamo damas tapaḥ śhauchaṁ kṣhāntir ārjavam eva cha
jñānaṁ vijñānam āstikyaṁ brahma-karma svabhāva-jam

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भावार्थ:

अंतःकरण का निग्रह करना, इंद्रियों का दमन करना, धर्मपालन के लिए कष्ट सहना, बाहर-भीतर से शुद्ध (गीता अध्याय 13 श्लोक 7 की टिप्पणी में देखना चाहिए) रहना, दूसरों के अपराधों को क्षमा करना, मन, इंद्रिय और शरीर को सरल रखना, वेद, शास्त्र, ईश्वर और परलोक आदि में श्रद्धा रखना, वेद-शास्त्रों का अध्ययन-अध्यापन करना और परमात्मा के तत्त्व का अनुभव करना- ये सब-के-सब ही ब्राह्मण के स्वाभाविक कर्म हैं॥42॥

Translation

Tranquility, restraint, austerity, purity, patience, integrity, knowledge, wisdom, and belief in a hereafter—these are the intrinsic qualities of work for Brahmins.

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English Translation Of Sri Shankaracharya’s Sanskrit Commentary By Swami Gambirananda

18.42 Svabhavajam brahma-karma, the natural duties of the Brhamanas, of the Brahmana caste; are samah, control of the internal organs; damah, control of the external organs-these bear the meanings as explained earlier (see 6.3, 10.4, 16.1); tapah, austerity-bodily austerity, as explained before (17.14); saucam, purity, as already explained (in 13.7, 16.3); ksantih, forgiveness; arjavam, straightforwardness, simplicity; jnanam, knowledge; eva ca, as also vijnanam, wisdom; astikyam, faith, the idea of truth [Truth of the scritpures, existence of God, etc. In place of asti-bhavah Ast reads astika-bhavah, the feeling of conviction with regard to the existence of God and the other world. Tr.] respect for the teaching of the scriptures. By svabhavajam (natural) is conveyed the very same idea as was expressed in ‘classified according to the gunas born from Nature’ (41).