That sounds like a potent correction or addition of attitude. Now you can practice what it suggests and see if it works. That is faith.

I expect the sentence is useful to others too.

Yes, communications of that type can be more noticeable on the edge of sleep.

But all sorts of mental phenomena can occur then too, and may not be all good, true or useful. Words and visions can arise in mind from all sorts of sources even just within itself. Like information coming through from the subconscious, for there is much information in there, and it may be right or wrong. Also if someone strongly holds two false and separate beliefs, then another one will arise between them to join and reconcile them. That is one of the most common forms of delusion and afflicts many. But judging from your writing (and words evident thought) I doubt you are susceptible to that because you are objective, and value truth more than your own preferences of what the truth may be.

Regardless of where information comes from, we always have to use our judgment to assess it, just like we do in daily life with all our other communications. Having freewill means we are responsible for our self.

The sentence you mention though, is obvious and self evident in its truth.

And truth is beauty.