Krishna introduces the fundamental mechanism of material psychology: the Three Gunas. He declares: Whatever states of existence there are—those of pure goodness and light (sāttvikā bhāvā), those of frantic passion and activity (rājasāḥ), and those of dark ignorance and lethargy (tāmasāś ca ye)—you must know that they all emanate and manifest exclusively from Me alone (matta eveti tān viddhi). However, I am not in them, nor am I under their control (na tv ahaṃ teṣu); rather, they exist within Me (te mayi).