Iron sharpens iron…both have the right and responsibility to sharpen one another. The sharper the swords, the more they just glide off each other. If there be any rust or dings and dents, the sharper sword will catch and grab the impurity or imperfection and whisk it off the other sword but with some friction this time.
Interesting…I just thought I would point out that yes iron does sharpen iron, but only when a master smelter or smith was originally involved. One could not take two iron swords and sharpen them on their own. This was a craft that was handed on from generation to generation. One could actually see this has a handing down of an “authority” to sharpen. It takes years of apprenticeship under a master to know what you are doing.
Too little carbon in the iron and you end up with soft metal that will yield in battle damaging the sword, to much carbon and the metal becomes brittle resulting in a broken sword.
Sure there is a chance that one might get the blast furnace to the correct temperature on their own and they might get just enough carbon to adhere to the blade so that they can get the proper result.
Keep in mind though, when sharpening iron we have the chance in this lifetime to test and see the results of our work. However, when it comes to the teachings of our Lord we have know way of knowing (on our own) if our conscience led us to the Lord or away, until the time of our final judgement. It’s one and done, no second chance to go back and reforge the sword.
Personally for me before I go into battle, I think I would rather have my sword sharpened by someone who’s been handing on the trade for the past 2000 years instead of from someone who claims they picked up the manual and understand the proper techniques.
The sharper sword will only wick off the imperfection if both swords were originally forged with the perfect amount of carbon to begin with. Even a 1% variance will ruin the final result of the alloy.
God Bless