They sometimes confuse belief with knowledge, despite the great difference between them. Knowledge and belief are two different things in their formation and source, and it is through opinion and belief that we proceed, and from them most of the events of history arise. Thanks to the discoveries of science at the present time, we see the possibility of solving this dilemma, and by solving it we are able to answer many important questions, including: How are religious and political opinions and beliefs stabilized? Why do we see in many people who have high perceptions the belief in myths and falsehoods? What is the reason for the inability of the mind to change our emotional beliefs? If it were not for the theory of belief, the matter of answering these and other questions would remain ambiguous and impossible to solve, and the mind cannot do this alone.