Choosing your 4x4 to get through life: this title is both a question (How to choose your 4x4?) and a goal (You have to choose your 4x4). Otherwise, how will we travel? You understand, we are not going to the auto show but to the self-reflection show. The author, an active entrepreneur, wants to share his experience in order to invite everyone to find his key points of reference, his «driving wheels», to cross life with serenity. The mythical 4x4 powerfully evokes the crew, the adventure, the challenge, the dream, the efficiency, the sobriety, the taste for nature, the novelty, the ability to overcome obstacles, the openness to the other, the knowledge of the terrain… values useful for the discovery of this unknown land: ourselves. This 4x4 is not bought, it is built by assembling the parts we find. Bertrand de Beaugrenier, agricultural engineer, graduated from Essec, is a business manager in the real estate sector. Today grandfather, he is passionate about heritage and transmission. In particular, he is the owner of the largest private building site listed as a historical monument in France on which 8 companions work full time. He regularly organises communication days for young people. He wishes to grow the youth through his personal experiences, as he himself was marked by his grandparents and his personal entourage.