"As iron sharpens iron, so a man
sharpens the countenance of his friend."
Proverbs 27:17
When I worked in mechanical insulation, knives were tools I used daily. One of the first things you learn after pulling those Dexter Russell or Old Hickory knives from the package is the factory edge is not sufficient. Knowing the intended use of a knife guided workers in how it should be sharpened: a fine edge on stainless for cutting rubber was accomplished with a dry stone, and using a double-cut file high-carbon blades could be made serrated. With a little practice, knives new and old were easily made serviceable by sharpening.
King Solomon compared the sharpening of iron using iron to how interactions with others sharpens friends. When swords or daggers were blunted, passing blades on one another corrected blunted edges so both were improved. Sharpening a blade with a stone uses it up, and over time files become dull and useless. This is where sharpening of friendship is far superior to modern ways of sharpening knives, because at the same time both people are made sharper.
To sharpen a dull edge it is necessary for exposed metal to be removed. This is the outworking of friendship, of people rubbing shoulders and spending time together. The people we surround ourselves with shall have an impact on us and sharpen us for future interactions. A knife can be a useful tool to do work or for self-defense, but it can also be wielded as a deadly weapon. Making friends with experienced workers would allow efficient and safe working practices to develop, but hanging with hardened criminals could sharpen us to do evil. Bad company corrupts whilst good company edifies.
No matter who you are or your life experiences, through faith in Christ we bring great potential for positive sharpening to relationships. The implication of sharpening is there is something in me that needs to change and flaws of character which need correction: there is the rust of self-focus to be removed, ignorant judgments to be ground away, ignorance which must be scraped off like burs to expose a new perspective by the help of friends. We would like to imagine we can do this ourselves through devotion and discipline, but nothing compares to personal fellowship and discipleship. Both young and old receive the sharpening benefits of friendship.
A dull blade requires more force to be effective and thus the risk of injury is increased. Better to spend a few minutes sharpening before starting to cut material than to make rough cuts. We have all been around people who could be described as "rough," either for their abrasive manner or cutting remarks. Our tendency is perhaps to avoid that person but remember Proverbs 17:17: "A
friend loves at all times, and a brother is born for
adversity." We can be friendly towards people who do not consider us a friend, and sharpening of both parties can occur. Our positive influence will affect them, and the LORD can use their roughness to hone us to our sharpest so we are fit for His use too.