Late in the eighth century b.c., workers hammer agricultural tools against flat stones. The Levantine heat presses down like a heavy woolen blanket. Men stand exhausted near the village gates. They watch sparks fly from the grinding wheel. The threat of border raiders keeps every guard tense. The sharp scrape of metal brings a sudden, heavy comfort.
Proverbs 27 outlines the raw friction required to maintain a functioning community. Sages gathered these observations during the reign of King Hezekiah. They recorded the daily grind of survival in a hostile land. A man tends a fig tree to eat its fruit. A blacksmith strikes an iron plowshare to cut the dry earth. Human relationships follow the exact mechanics of abrasion and heat. Ignorance acts like a heavy stone or a sack of wet sand. Testing a man requires a similar furnace. Ancient Near Eastern metallurgists used thick clay crucibles to heat silver ore to nearly two thousand degrees Fahrenheit. The fire burned away the worthless slag. The heat exposed the pure metal.
The friction of two iron tools grinding together strips away rust and dull edges. This violent collision is the only way to restore the metal for actual labor. Men repair one another through the same blunt force. Honest correction acts as the grinding stone for a dull mind.
A blunt axe requires more muscle. A wise man lets a neighbor grind down his dull edges.
The discarded metal shavings fell into the soil beneath the grinding wheels. They oxidized into the earth. The dirt claimed the filings and left behind men better equipped to harvest the fields.