Through instructions delivered by the preceptor one knows that which lives within this body to be of a four-fold nature, having besides four doors and four mouths. In consequence of two arms the organ of speech, the stomach, and the organ of pleasure, the very duties are said to have four doors. One should, therefore, do his best to keep those doors under control.
चतुरं पुरुषं चतुर्मुखं चतुर्धा चैनमुपयाति वाचा। बाहुभ्यां वाच उदरादुपस्थात्तेषां द्वारं द्वारपालो बुभूषेत।।