Jean Guitton, a great admirer of Bergson gives an almost romantic portrait of his master. The years of youth, the beginnings and Bergson's personality are traced with modesty, subtlety, intelligence and height. It draws information, beautiful citations and two rare texts annexed Berson still at the Ecole Normale. But in the second half, Guitton is more subjective and tends to row all the work of Bergson to a search of spirituality, much of Catholicism, which is pretty gear (as in the work of Chevalier).