Grateful for your attention, @owasco. The fragment he quotes belongs to a letter Rimbaud wrote to his friend Paul Demeny in 1871, when he was barely 20 years old. It is the well-known "Letter of the Seer". This text is a key piece in the reflection on modern poetry.
Aspects related to several of the very valid questions it presents will be the subject of future posts.
Rimbaud's work is a decisive milestone in the course of modern poetry; not said by me, but by prominent critics. One of them, Yves Bonnefoy, stated in one of his studies: "To understand Rimbaud, let us read Rimbaud".
Greetings.