Thoughts. We think we have a much better grasp on our own thoughts than in fact we do. Priming, encoding specificity, reacting to situations physically before we can articulate that we are reacting, and memory distortion among many other things show we are aware of much less of our thoughts than we think we are.

Further, many people confuse words for thoughts. Even when you express yourself through words you cannot fully convey what is on your mind.

Words may be a type of thought but they are not the unit of thought. Consider for a moment when you know what you mean but struggle to find the word to express it. That thought is one not in words.

Describe all you can about a smell, a taste, or a color -- there is more in your experience of it than in your description. From simply your description another likely would not be able to recreate the exact thing.

Think about a smell which evokes in you a memory. You may put words to that memory but there is more in your experience than the words alone can do justice.

Not only are words not the unit of thought, more they may not be understood as intended. We each use words based on the experiences we've had. While there is a lot of overlap between how we have seen words used and how we have seen them defined our experiences are not identical. Uses differ, definitions differ if only slightly so. We can see this on a large scale as messages aren't interpreted the same between people of different political affiliation, socioeconomic status, or region but also at a smaller scale where even within similar groups there are different interpretations of the same sentence.

We cannot even explain what it is like to be us, to do so implies we know what it is like to be our audience as well as to know what it is like to be ourself and therefore to know what is different and worthy of commenting on