in Thoreau’s Journal:
The drifting white downy clouds are to the landsman what sails on the sea are to him that dwells by the shore, – objects of a large, diffusive interest. When the laborer lies on the grass or in the shade for rest, they do not too much tax or weary his attention. They are unobtrusive. I have not heard that white clouds, like white houses, made any one’s eyes ache. They are the flitting sails in that ocean whose bounds no man has visited. They are like all great themes, always at hand to be considered, or they float over us unregarded. Far away they float in the serene sky, the most inoffensive of objects, or, near and low, they smite us with their lightnings and deafen us with their thunder. We know no Ternate nor Tidore grand enough whither we can imagine them bound. There are many mare’s-tails to-day, if that is the name. What could a man learn by watching the clouds?
The objects which go over our heads unobserved are vast and indefinite. Even those clouds which have the most distinct and interesting outlines are commonly below the zenith, somewhat low in the heavens, and seen on one side. They are among the most glorious objects in nature. A sky without clouds is a meadow without flowers, a sea without sails. Some days we have the mackerel fleet. But our devilishly industrious laborers rarely lie in the shade. How much better if they were to take their nooning like the Italians, relax and expand and never do any work in the middle of the day, enjoy a little sabbath in the middle of the day.