The Ignorance which rests on Knowledge, extends its influence over all the three states. The knowledge, again, that follows the Understanding, is attacked by Ignorance.
ज्ञानाधिष्ठानमज्ञानं त्रौंल्लोकानधितिष्ठति। विज्ञानानुगतं ज्ञानमज्ञानेनापकृष्यते॥