"either go right or go left" is a more satisfactory form of parellellism, indeed. "neither go right nor go left" would limit one's options, especially at a fork in the road. And neither has much to do with Owlbow's question, since he's advising keep an open mind to passion, grace, and thoughtful concern (Oops! Comas!), not take yer choice.
I had always thought it was white on rye,like a stripey sandwich.
Hmm.
And...How many say eether and neether and how many eyether and nyether?