People tend to overestimate their ability to concentrate and underestimate the amount of time their attention was unfocused. On a broiling afternoon, the comparative coolness of the interior of the old buildings was very welcome, as was the guided tour and demonstration by the volunteer miller.
The miller often had high social status in his local community because he controlled one of its most important services and because he regularly met almost everyone in the neighbourhood.
One is that it comes from the supposed habit of millers who checked that the stones used for grinding cereal weren't overheating by putting their nose to the stone in order to smell any burning. The miller's tale might have worked for Chaucer, but it doesn't help here.
Select your currency from the list and click Donate. Of course, the phrase could take on a completely different meaning if we were talking about some bicephalic creatures like Zak and Wheezie the two-headed dragon on Dragon Tales or Orthos aka Orthrus, a two-headed dog in Greek mythology, sibling to his more famous brother Cerberus, usually depicted as three-headed.
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We also say that sometimes a person "cuts off his nose to spite his face. You will listen to them when they have a problem they need to talk about. A better approach But to do this effectively meant the miller had to stay constantly close to the stones — hence, keep his nose to the grindstone.