I have been writing a few manuscripts in iambic heptameter or "fourteeners." These lines are often divided into one that is 8 syllables and one that is 6. I realize that lines read really well when they are perfectly divided that way, but no book I've come across perfectly keeps that pattern. I see a lot of 7/7, 6/8, 8/7, 9/6, 7/6, 10/4, 4/10 etc. which still read well as long as the stresses are in the correct places. Is it critical to keep the 8/6 pattern? And if I break that pattern frequently in a text, is it better and less distracting to just write in a single 14-er line without breaking the line up into two?
I hope this question makes sense! Forgive my ignorance if the answer is in fact obvious.