"You undoubtedly aspire, reader friend, to a successful life. Not necessarily to succeed in life, but to lead a good and happy existence. Ever since, all over the world, men and women have been nourishing this aspiration and working to implement it. Everyone believes that what makes our life meaningful is to grow in humanity. I am convinced that this philosophical ideal of wisdom remains the object of a quest we can no longer present, because we are not only on earth to ensure our material security, to entertain us and to consume us." How can we be self and to agree to the world? To become more loving and virtuous? To find the path of inner liberation? To grow in joy and to find serenity? All these questions to which Frédéric Lenoir, himself in search of wisdom since adolescence, answers with sincerity and simplicity, leading us to his continuation in the footsteps of his inspirators, such as Epicure, Epictet, the Buddha, Chuang-tse, Montaigne, Spinoza or Etty Hillesum, inspired even by the wisdom of the children. A luminous and dense book like wisdom. Frédéric Lenoir is a philosopher and sociologist. He chairs the association SEVE, which trains animators in the practice of philo workshops with children, and the association Ensemble pour les animaux. He has published numerous essays and novels translated into twenty languages. His recent works Little Treatise of Inner Life; Soul of the World; Happiness, a Philosophical Journey; The Power of Joy; The Miracle Spinoza, have been at the top of the bestseller lists.