मुक्तसंग्ङोऽनहंवादी धृत्युत्साहसमन्वित:।
सिद्धयसिद्धयोर्निर्विकार: कर्ता सात्त्विक उच्यते ॥१८.२६॥
Freed from attachment, non-egoistic, endowed with courage and enthusiasm and unperturbed by success or failure, the worker is known as a pure (Sattvika) one. Four outstanding and essential qualities of a worker. - Bhagwad Gita : XVIII-26