Ignorance, Darkness, and Goodness, these are called the (three) qualities. These are connected with one another. They exist depending on one another.
तमो रजस्तथा सत्त्वं गुणानेतान् प्रचक्षते। अन्योन्यमिथुनाः सर्वे तथान्योन्यानुजीविनः॥