"You think about yourself too much and that gives you a strange fatigue that makes you shut off the world around you and cling to your arguments. A light and amenable disposition is needed in order to withstand the impact and the strangeness of the knowledge I am teaching you. Feeling important makes one heavy, clumsy, and vain. To be a man of knowledge one needs to be light and fluid." - from "A Separate Reality" - more where this comes from:
http://www.prismagems.com/castaneda/  ¶ 5:32 PM