Non-verbal thoughts are important during meditation because they can lead to deeper understanding. A tree is called a “tree”, yet where did the word originate but from a lack of understanding?
Everything is made of the same atoms and molecules, just in different vibrations.
IMO, language takes away from our “abilities”, but I don't know how we would communicate clearly without it. A lack of understanding is one of man's greatest distractions. Just because something is “green” and has “leaves” doesn't mean it is a “tree”, only that we know it as a “tree”.
What non-verbal thoughts pass through your mind during meditation?