The five senses, Faculty, Mind, and Understanding,-these are regarded as organs of knowledge by those conversant with the spiritual science.
चित्तमिन्द्रियसंघातं मनो बुद्धिस्तथाष्टमी। अष्टौ ज्ञानेन्द्रियाण्याहुरेतान्यध्यात्मचिन्तकाः॥