Verse
शमो दमस्तपः शौचं क्षान्तिरार्जवमेव च ।ज्ञानं विज्ञानमास्तिक्यं ब्रह्मकर्म स्वभावजम् ॥
Calm, self-control, askesis, purity, long-suffering, candour, knowledge, acceptance of spiritual truth are the work of the Brahmin, born of his svabhāva
Gītā 18·42