Analysis of information sources in references of the Wikipedia article "克勞德·莫奈" in Chinese language version.
Much closer to Monet's own atheism and pessimism is Schopenhauer, already introduced to the impressionist circle in the criticism of Theodore Duret in the 1870s and whose influence in France was at its peak in 1886, the year of The World as Will and Idea.
Then Monet took the end of his brush and drew some long straight strokes in the wet pigment across her chest. It's not clear, and probably not consciously intended by the atheist Claude Monet, but somehow the suggestion of a Cross lies there on her body.