The author offers a deep reflection, sprinkled with useful advice with an edifying aim, on the application of our abilities to achieve a full and happy existence. To this end, she brings together scientific, psychological and human points of view. This full and happy existence is achieved in the knowledge and optimization of certain areas of the brain. With this book we will learn to set goals and objectives, exercise our will, activate emotional intelligence, develop assertiveness, avoid excessive self-criticism and self-demands, and affirm our optimism.