The great task of human beings is not only to live, but to live well.

Every day we have to face one of the most important activities of human beings: making decisions. The first thing we do when we open our eyes can influence the rest of the day. The attitude we take will cause our genes to activate, favoring or harming our health. Discovering this fact marked a before and after in the world of science.
Can we say that our mood or our attitude affect our genes? How does the lack of love affect health? Why does lack of love make us sick? What happens in our brain if we are treated as objects that must meet the expectations of others? These realities and these processes, closely related to our health and, in the medium term, also to our happiness, are what these pages tell us about.
Therefore, let us stop and think if we have adequate tools to face the different daily challenges. The good news that comes from neurobiology is that our brain is capable of learning and constantly changing, adapting to life's challenges because it is highly plastic, malleable and ductile, and has the ability to adapt to new circumstances.
This book has a single purpose: to help us learn to live a full and healthy life. Alfred Sonnenfeld - a doctor and theologian - combines the scientific and spiritual points of view, relying on the latest advances in neurobiology and epigenetics to show us that, with an enthusiastic attitude, we can achieve our goal with the help of two powerful allies: our genes and our brain.

«The author explains in an understandable way and with scientific rigor the brain tools necessary to achieve a happy and full life.» Fernando Rayón, Ars Magazine.