The ten senses or Das Indriya are the gateway between the inner and the outer,
in the twin roads of this phenomena we call experience or action.
The co-ordinator of this remarkable interface is known as Manas.
The identifier in this remarkable process is known as Ahaṃkāra.
The discerner in this remarkable trinity is known as Buddhi.
The observer in this remarkable play of experience and action is known as Cit or Puruṣa.