There are again three classes (of mental perception, viz., those that appertain to Goodness, those that belong of Darkness, and those that belong to Ignorance. With them are connected three kinds of consciousness, including all feelings and emotions.
सात्त्विको राजसश्चापि तामसश्चापि ते त्रयः। त्रिविधा वेदना येषु प्रसूताः सर्वसाधनाः॥