Choosing the Main Character Approach, Do-er or Be-er, limits the domains in which the Main Character's personal issues may reside. A Do-er is limited to the external domains of 1) a problematic situation (Universe) or 2) a problematic endeavor or activity (Physics). A Be-er is limited to the internal domains of 1) problems created from fixed attitudes (Mind) or 2) problematic ways of thinking (Psychology).