Attention (n.) that two things almost match is less a feeling than a glance oscillating between them, words of doubt, a shake of the head — hardly any room left for a feeling of similarity.
Attention (n.) paid to a feeling is not an inward pointing: attending to it produces or modifies it, whereas observing a chair does not change the chair.
Attention (n.) by looking produces the impression, and one cannot look at the impression: Observe the colour means open your eyes to colour, not See the colour you see.
Attention (n.) has no duration: no one says I noticed it for five minutes.
Attention (n.) is a visual experience, as when one spots a feature of an object's organization.
Attention (n.) while reading is not the images that pass through you, though you may afterwards be able to report them.
Attention (n.) is dynamic, not static: a readiness to follow the slightest movement, not a fixed gaze.
Attention (n.) directed is the part of expecting that corresponds to searching in a space.