No, it's a way of explaining that there is a difference between the experience of truth and the truth itself.
Which is why we have the trinity.
You don't understand it, so you dismiss it as nonsense when really it is nonsense.. to you.
What do we do with the trinity? We acknowledge the medium. Who else does this?
You know, there is a difference between a picture of a cow and a living breathing cow in front of you.
Now imagine for a moment that the only way we could see The Truth is through a picture of The Truth.
So when we experience God who is The Ultimate Reality, we are doing it towards God in Truth with a spirit of Truth.
And that is as close as you are going to get with it.
And the reason why they are all 1 is because it is The Truth we are talking about!
And if none of that makes sense to you, it isn't because it is nonsense. It is called a mystery for a reason!