So what about those lines?

And the line breaks?

Often, if not always, you want the poem to move forward—to move the reader forward. Do you end the line in the middle of a thought or a phrase? Do you end with a verb?

(Here I admit that I have a completely inflexible aversion to ending a line with "and"; I think it's a part of my editor character flaw.)

Or do you want each line to be able to stand, with strength and rhythm, on its own?

I think the answer lies in some graceful balance between the two. How do you find it?