Can you identify this literary fragment ?

I found the text in a language I’m quite sure the original doesn’t belong to. The way I’ve translated it reads as follows:

(First two phrases):
My Mother begged me that under no circumstance should I die before her. I promised this to her, and my desire to put an end to it and throw myself on a winter’s evening into the Seine, or into the sparkling/foaming waters of some wild coast, is transformed into a feverish glance at the surface of the waters, the boundary between life and death, the door forbidden to me due to the promise given to my mother.

(Last phrase):
The history of my head was connected to that of my body, as the stars to space, the sun with helium and ships with oceans.