Finally, the moving center working in place of the thinking produces,
for example, mechanical reading or listening, as when we read or listen to words without understanding their meaning. This usually happens when the attention that should be directing the thinking is occupied with something else, and the moving center attempts to replace it. This kind of substitution easily becomes a habit, because the thinking center tends to become distracted not by useful thought or contemplation, but rather by daydreams and the play of the imagination. Observation of these activities is an important part of self-study.