I get a kick out of object lessons. They were a mainstay at a congregation I attended for a third of my life, but that's a different story. I have nothing bad to report about them anyhow, Ahem...
An object lesson is where the speaker, or writer in this case relates his or her lesson with inanimate objects, hence the point of an object lesson. Now that the niceties are out of the way, and we always need to, well, be nice; we can move along.
Callbacks are a fact of life where I work. It can range from miscommunication to error on part of the technician, or something else just breaks. When we deal with man-made contraptions, we have issues. Such is the case until the Lord Jesus comes back to take back and rule this planet in the manner it ought to be ruled. I got a call from one of my coworkers that found a huge problem with a job I did. Because we service heating, ventilation, and air-conditioning equipment, we have to climb on roofs of commercial building to change filters, belts and clean the condenser coils on package units that live up there.
For the most part, these units do their thing without too much hassle. A little T.L.C. and these contraptions will do what they're supposed to do for eight to ten years. One crucial function is that these need to take the heat out of a building and send it somewhere, preferably outside. This is so the occupants in said building can work in relative comfort. In a kitchen, this is doubly important, not only for comfort but sanitary reasons as well.
To make a long story short, I arrived to a rooftop unit in trouble. Even after my cleaning, enough grease from a nearby exhaust was caked on the condenser coil, which is the part that gets rid of the heat. If it's blocked, covered, or obstructed in any way, the unit will have to work harder to remove the heat. On a 90+ degree day, the unit is fighting a losing battle and will eventually fail. Even on the very mild day we had today, this one was in an uphill climb and the kitchen was relatively warm and humid.
After some figuring, I lugged a garden hose, two gallons of industrial strength coil cleaner (which is a fairly strong acid), a nozzle and the appropriate safety measures up the ladder to the unit in question. With a spray bottle, I sprayed the acid, full strength, on the condenser coil. Eventually, the grease and other accumulated filth bubbled angrily to the outside, where I washed it off with the hose. It took no less than several treatments and all of the coil cleaner to mitigate the mess and get the unit back to rights. The result wasn't much to look at, but at least it was workable and all but the most stubborn grease was now history. A quick peek in the kitchen confirmed the results; it was like an icebox. Mission accomplished! For now.
We human beings also have a purpose. This is to glorify the Lord Jesus and do His work. While Satan accuses us before the Lord, sin is the means that causes us not to function as we should. When we're not in the Word, in prayer and into the traps and snares of this world, we become dysfunctional for our prime function. The only way to mitigate sin and all its trappings is through the maintenance of prayer, the Word and hopefully a Bible-believing congregation (something I'm working as well). As Christians, we are not of this world, in a very real sense. We are supposed to do His work. We do that better when unobstructed by sin.