This is one of many verses in scripture that must qualify as a tongue twister. Why? Because I know lots of people who stumble all over this and are unable to utter it. I once heard a pastor preaching through the Gospel of John and he just skipped over all those hard, verses as though they didn’t even exist.
It’s kinda like the word “shibboleth" as used in Judges 12:1-4.
Try it yourself. If you can read it out loud, you are a Calvinist; if not you are probably an Arminian.