Abstract: Malebranche disapproves of the imagination when it becomes contagious, but he makes a particular use of his own. Used in the perspective of a Christian reformation of man subjected to the powers of the disordered imagination, it opens up the areas of philosophical investigation and contributes to create a real novel of imagination in God. Polyphonic, it constitutes both a link and a source of interrogation on the constant tension between theology and the multiplicity of knowledges.