  According to Hadot (103–4), by ‘erase impressions’ Marcus means ‘assent only to objective and physical descriptions of externals’. What Marcus is telling himself to erase, Hadot says, is value-judgments about everything external to his character. Hadot thinks Marcus is simply confused in using the term phantasia for these judgments (the correct term, which he sometimes uses [cf. iv.39, v.26, viii.4], and which he sometimes distinguishes from phantasia [cf. viii.47–49], is hupolêpsis or ‘assumption’).