Phrased like this, your aim is obviously that the idea in my head closely resembles the idea in your head. Don’t get distracted by trying to make your text more closely resemble the idea in your head; your text is just a tool to get past my eyeballs and into my brain.
The best advice I have for improving that resemblance is this: Re-read your writing looking for other possible ideas that could be formed, and then edit it such that it is incompatible with as many of the other ideas as possible. You may need to put it down and come back later with fresh eyes in order to see those other possible ideas.
This sounds like the cliche advice of “re-read and edit, put it down and come back with fresh eyes“ - because it IS that cliche, expanded into the most specific and effective form of itself that I know. Unfortunately, the cliche by itself isn’t as helpful, since there are many other ways to expand it. You could re-read, but looking to see how closely it resembles the idea in your head (a common mistake, I cautioned against it above). You could edit, but such that it has fewer words (aesthetically pleasing for sure, but it risks sacrificing that all-important ‘inter-brain idea-resemblance’). You could come back with fresh eyes thinking the goal is to rediscover and refine the idea that’s already in your head (a good way to think, but this is more precisely called ‘journaling’ and it doesn’t have much to do with writing to communicate.)
Case in point: it was only upon re-reading my comment and thinking ‘damn, that last paragraph is really long, can I fix that?’ that I realized the entire last paragraph is literally me being worried that you’ll see “re-read … edit … come back with fresh eyes” and then the idea that ends up in your head will just be whatever you usually interpret the cliche to mean, instead of the very specific process I have in mind! I should also add a concrete example, those are usually very effective. I suspect concrete examples are helpful precisely because they are derived from your idea and not from your text description of the idea: there’s a cloud of possible ideas compatible with the text you wrote, and there’s another cloud of possible ideas compatible with the examples you give, and the intersection of those two is quite specific.