Clear in Dianetics and Scientology is one of two levels a practitioner can achieve on the way to personal salvation. A state of Clear is reached when a person becomes free of the influence of engrams, unwanted emotions or painful traumas not readily available to the conscious mind. Scientologists believe that human beings accumulate anxieties, psychosomatic illnesses, and aberration due to receiving engrams throughout their lives. By applying dianetics, every single person can reach Clear.^[1]

A person is said to be a Clear when he "no longer has his own reactive mind and therefore suffers none of the ill effects that the reactive mind can cause." A Clear is said to be "at cause over" (in control of) their "mental energy" (their thoughts), and able to think clearly even when faced with the very situation that in earlier times caused them difficulty. The next level of spiritual development is that of an Operating Thetan. A person who has not reached a state of Clear is called a "pre-clear."^[2]