Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.

10 Ways to Mill

1. Ball Mill (slightly inclined or horizontal rotating cylinder partially filled with balls of stone or metal which grinds material to the necessary fineness by friction and impact with the tumbling balls)
2. Rod Mill (rotating drum causes friction and attrition between steel rods and ore particles - term also used for slitting mill which makes nails)
3. Autogenous Mill (rotating drum throws larger rocks of ore in a cascading motion which causes impact breakage of larger rocks and compressive grinding of finer particles)
4. SAG Mill [Semi-Autogenous Grinding Mill] (essentially autogenous mills, but utilising grinding balls to aid in grinding as in a ball mill)
5. Pebble Mill (rotating drum causes friction and attrition between rock pebbles and ore particles)
6. HPGRs [High Pressure Grinding Rolls] (two rollers with the same dimensions rotate against each other with the same circumferential speed)
7. Quernstones, Millstones or Buhrstone Mill (old fashioned pair of stones one over the other)
8. VSI Mill [Vertical Shaft Impactor Mill] (throws rock or ore particles against a wear plate by slinging them from a spinning centre that rotates on a vertical shaft)
9. Edge Mill (stones roll around on their edges, on a level circular bed)
10. Burr grinder (two revolving abrasive surfaces separated by a distance usually set by the user)

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