The senses are the citizens who are employed by the mind. For maintaining those citizens the mind shows a strong inclination for various sorts of acts. Two great faults are seen in those acts, namely, Darkness and ignorance.
इन्द्रियाणि मन:पौरास्तदर्थं तु पराकृतिः। तत्र द्वौ दारुणौ दोषौ तमो नाम रजस्तथा।