BG Chap 18 - Determination in the mode of goodness
Determination which is unbreakable, which is sustained with steadfastness by yoga practice, and which thus controls and engages the activities of the mind, life airs and senses in unswerving concentration on the Lord is in the mode of goodness. In this type of yoga, there is only contemplation of the Supreme Lord, without accepting any other object. Intelligence is in the mode of goodness when it recognizes and engages in a religious act. Determination is that which makes the intelligence firm in its decisions. Determination that prevents us from performing degrading actions is also in the mode of goodness.