When I first think of something like the chair or the letter, I get a very vague general out-of-focus detail-less version of it, and as soon as I try to focus on it for details, then I can only see a small part of. The more detailed, the smaller the part. I can move mentally imaging it part by part, but they are fractured images and I can't put them together as a whole anymore unless I try to start the process from the beginning and back to the vague abstract image of it. If I try to imagine the whole with the any level of details, I lose the picture entirely.
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"The thought manifests as the word. The word manifests as the deed. The deed develops into habit. And the habit hardens into character. So watch the thought and its ways with care. And let it spring from love, born out of concern for all beings."