 The process of evolution of the world from Ur-Nature is briefly as follows. The first evolute of prakṛti is the mahat-tattva (the Great Principle, the Cosmic Intelligence or buddhi). From this emerges I-consciousness (ahaṃkāra). From the sattva aspect of I-consciousness evolve five organs of knowledge (eye, ear, nose, tongue and skin), five motor organs (speech, hands, feet, reproductive and excretory organs) and manas (sometimes translated as mind); from the tamas aspect of I-consciousness emerge five subtle elements (pañca-tanmātra), viz., sound, touch, colour, taste and smell. The five subtle elements give rise to five gross elements, viz., ākāśa, air, fire, water and earth.