________________ 12 Part I. Origin 5. Space (akasa) and 6. Time (kala). There are several different ways by which these substances are classified. These classifications are mainly based on certain distinguishing qualities of the substances. Following are the various classifications: I. Depending upon presence of life: 1. Living (jiva) and 2. Non-living (ajiva). II. Depending upon the presence of form: 1. Formed (rupi) and 2. Formless (arupi). III. Depending upon the presence of number of space units: 1. Constituent (astikaya) and 2. Non-constituent (nastikaya). A constituent substance is the one with more than one space units; it is an intimate component of the universe. Soul, matter, medium of motion, medium of rest and space are the constituent substances. The non-constituent substance has only one space-unit and is not an intimate component of the universe. Time is the non-constituent substance. SOUL (atman): Soul is a sentient substance, a substance that is life. It possesses four qualities, (1) Perception (anant darshan), (2) Knowledge (anant gnan), (3) Bliss (anant sukh) and (4) Energy (anant virya). One quality that is very special to the soul is its ability to change its size depending upon the size of the body it occupies. It can be compared to the light from a lamp that is able to brighten the room of any size, whichever place it occupies at that particular time.
