This book is not a human development book and is not a book for specialists. It is a book for everyone with a cultural dose to reach psychological immunity based on facts and scientific research that I presented in a simplified way to raise the level of awareness in maintaining your mental health. There is no absolute optimism and no harmful pessimism. It contributes to how to understand life from A simplified psychological perspective is a book that calls for realistic thinking, whether positive or negative, and the most difficult thing for a person to understand himself is why one of us wakes up from sleep while he is upset and does not know why he is upset, why does one not rest for another without a clear reason Why does a person feel the pain of loneliness when he is surrounded by many friends Why does he not sleep despite his enjoyment of good physical health and he does not suffer from any pressures Why is the mood volatile sometimes he feels satisfied and sometimes angry Will my problem continue forever What is it that I am alone I will try in this book and in other books to come Answer such questions, I may have answers, but I do not have all the answers