"Awareness by itself is not enough: it must be joined by mastery. We need gradually to develop a steering ability to keep ourselves from slipping mechanically into this or that sub-personality. Thus we become able to identify with each part of our being as we wish. We can have more choice. It is the difference between being impotently transported by a roller coaster and, instead, driving a car and being able to choose which way to go and for what purpose to make the journey."