Clay jars are delicate. They crack easily even though they may seem relatively durable. On one hand, clay jars are refined by fire. There are several steps to making them, culminating with the kiln. This furnace carries the clay from an unfinished product to a household amenity. But once completed, the slightest nudge on the corner table could send a jar plummeting to its demise. The durability is deceiving. The thick porcelain is more delicate than it appears. No wonder the Bible often describes people as jars of clay. We are like potter's vessels, waiting to be broken into millions of tiny pieces (Psalm 31:12, Isaiah 30:14). We are weak. We get tired and weary. We grow old and frail.
Being a mom to small children, I am faced daily with my weakness. Often it's in the form of tiredness and impatience. Motherhood can be tiring, but my children are not at fault for my weakness. They are a great joy and blessing. The tiredness part actually becomes another reminder that I am a part of a fallen world. It makes me feel how badly I need a Savior. A scenario that has played out in my home looks like this: I’m tired, yet in my pride I resist rest. After all, there's so much to do. But then this "tiredness without rest" can lead to impatience with my loved ones.
[Read the rest of the article at Desiring God.]