Chapter 18, Verse 48
Part of 18: Mokṣha Sanyās Yog — मोक्षसंन्यासयोगसहजं कर्म कौन्तेय सदोषमपि न त्यजेत्।सर्वारम्भा हि दोषेण धूमेनाग्निरिवावृताः॥
saha-jaṁ karma kaunteya sa-doṣham api na tyajet sarvārambhā hi doṣheṇa dhūmenāgnir ivāvṛitāḥ
One should not, O Arjuna, abandon the duty to which one is born, though it may be faulty; for, all undertakings are enveloped by evil, just as fire is by smoke.
Sahajam Born with oneself born with the birth of man. Sadosham Faculty for everything is constituted of the three Gunas. All undertakings Ones own as well as others duties. If a Vaisya or a Kshatriya does the duties of a Brahmana he will not in any way be benefited. Anothers duty brings in fear. Therefore it is not proper to perform anothers duty. It is not possible for any man who has no knowledge of the Self to relinish action totally therefore he should not abandon action.