“It is the feeling of inferiority, inadequacy and insecurity that determines the goal of an individual’s existence.”

“One motive is common to all forms of vanity. The vain individual has created a goal that cannot be attained in this life. He wants to be more important and successful than anyone else in the world, and this goal is the direct result of his feeling of inadequacy.”

“ Every child is left to evaluate his experiences for himself, and to take care of his own personal development outside the classroom. There is no tradition for the acquisition of a true knowledge of the human psyche. The science of human nature thus finds itself today in the position that chemistry occupied in the days of alchemy.”