This thesis has set itself the task of reviewing the new and original way in which Maurice Blondel revisits the classic proofs of God’s existence, mainly, the ontological argument. This argument holds, in our author, a prominent place, and is a key moment in the development of his doctrine. It is an approach that makes sense as a return to an old doctrine (See the Anselm’s argument ), but at the same time as an original development. From this point of view, reading followed by L’Action suggests three lines of interpretations of the ontological argument that our thesis intends to highlight.Firstly, Blondel reread the proofs of God’s existence from the perspective of the dialectic of the will they begin the third time conflict before the conflict will be resolved in alternative or optional. Because, there is always a mismatch between what is wanted and dynamism which, in us, is the principle of the will that is to say between what he calls the necessary will and determination voulante. Consequently, it is for the One need Blondel draft synergy evidence and renewed, in a way, the ontological argument to show that every man is inevitably embedded.Then use an inaccessible stranger, whose presence is sensed without being yet still recognized or the explicit reference to apophatiques expressions to speak of Being or the Absolute manifests clearly symptomatic use of negative theology as acknowledges, following the Pseudo-Dionysius that “the statement is less just, and truest denial”, and especially as he adds, “ it is the nothingness that confess.” However , this data does not weaken in any way the relevance of the evidence , because Blondel makes a truly spiritual experience.Finally he draws the consequence of this replay, emphasizing the philosophical significance of the option, which is the central authority confirms that this approach has not referred to the full possession of Being, but an opening, a necessary preparation to admit our poverty and affirm the existence of God. For each existence, " the evidence is less a view that a life " and following the influence of the Cartesian evidence " it is absolute that where there is perfect idea of perfection , there where gasoline is real and the ideal existence . In these circumstances, the idea of God, of Being is refracted as conditioned , darkened by our imperfection . However, it forces us to state , after all, the place where it is not , its reality, its perfection.From a reconsideration of the joints of proof in L'Action, our thesis has had the task of clarifying the scope and relevance of these three areas which constitute the originality of the Blondel reading the ontological argument.