धृत्या यया धारयते मनःप्राणेन्द्रियक्रियाः |\nयोगेनाव्यभिचारिण्या धृतिः सा पार्थ सात्त्विकी ||१८-३३||
dhṛtyā yayā dhārayate manaḥprāṇendriyakriyāḥ .\nyogenāvyabhicāriṇyā dhṛtiḥ sā pārtha sāttvikī ||18-33||
The steadfast willpower that is developed through Yog, and which sustains the activities of the mind, the life-airs, and the senses,  O Parth, is said to be determination in the mode of goodness.