This book is the result of 4 revised and improved articles. Why the number 4? Because in the knowledge of the Murids, the number 4 is symbolic of the life of Sheikh Ahmadou Bamba. He is called the "Marabout" number 4.His honorable mother had 4 children. He was deported to 4 places. He almost always writes in Quatrain.He celebrates the Prophet in 4 of his mystical odes. Writing about him can therefore be done in 4 parts.