Philosophers have always asked about the concept of happiness and ways to reach it, they differed a lot about its definition, and their views differed about how to feel it, to the extent that some of them prompted to deny their existence completely, protesting that the individual does not need to be happy, is sufficient to be satisfied, or reduce severity His pain and suffering. Although this question presented, science did not try to answer it until recently, in recent decades, within his greatest endeavor about understanding the nature of the brain, human behavior and controlling it. To understand the nature of feelings of joy, happiness, and contentment, and trying to differentiate between them, the writer set out from a simple hypothesis; Are the vital processes that occur inside the brain affected and affect our feeling of happiness?