The main purpose of this research-based, self-help book is to introduce the goal-and-causal theory of "Psychological Time," and to help you calculate your "Psychological Age"-that is, how old you feel, based on significant events in your life. You can also learn how to lower your psychological age (feel younger), using past experiences to move into the future, rejuvenating the mind for more satisfying personal growth, productivity, and happiness. We humans created the convention of Time - hours, days, millennia. But we also created "Psychological Time," which we can compress (to survive an interminable wait, for example), or expand (to luxuriate in pleasure). So fully-integrated into our brain is this "Psychological Time" that, as part of the illusion, we can lose touch with "real" chronological time altogether, and even change the sequence of past events to contradict or override our otherwise communal understanding of the world. In this book, you will generate "Causograms," a kind of map that graphically represents your perception of the cause-and-effect and goal-based connections that your mind naturally makes between life experiences. These include, but are not limited to achievements, memories triggered by new experiences, and expectations based on prior accomplishments. This process allows you to re-examine the relation between life events, goals and personal interactions, then compare your resulting "Psychological Age" to your chronological age.