At three years of age, the child's whole emotional life plan has been laid down, his… — John B. Watson

At three years of age, the child's whole emotional life plan has been laid down, his emotional disposition set. At that age, the parents have already determined for him whether he is to grow into a happy person, wholesome and good-natured, whether he is to be a whining, complaining neurotic, an anger-driven, vindictive, over-bearing slave driver, or one whose every move in life is definitely controlled by fear.