Sattva constancy, O Partha, is that by which through devotion one controls the function of the mind, the life-breaths and the senses.
धृत्या यया धारयते मनःप्राणेन्द्रियक्रियाः। योगेनाव्यभिचारिण्या धृतिः सा पार्थ सात्त्विकी॥