An author enjambs lines to connect ideas.
an enjambment occurs when the poet breakes the syntactic unit at the end of a verse without any punctuation mark, so it continues on the next one.
By doing these, the poet can increase the dramatic tension of the poem and also give multiple meanings and different ideas to the poem or the stanza. If you read the line with the enjambment on its own, it can portray an idea that will be changed or complemented if you read it along with the next verse.