I write to sing, and for me, each line (by line I don’t just mean the typical line a line-break makes, but each line of a sentence fragmented by a punctuation mark) must be musically self-sufficient.
I should start by saying, I don’t think of it as ‘writing’ poetry as such, but more of ‘making.’ So the writing itself often comes out of me without too much suffering, but the making is quite an ordeal.