The last three verses of his chapter describe the great desolation that the land of Judah would become.
The currency of those ancient days, was silver in the form of a coin called the shekel.
The shekel was both a weight standard and a coin.
Before the invasion, the land was prosperous and valuable. Any given vineyard would be worth a silver coin for each vine. And larger vineyards had vines that numbered into the thousands and were thus quite valuable.
But, agriculture in Judah required constant maintenance, constant cultivation and as a result became valuable.
That is a subtle principle that describes the spiritual life of the individual. Your spiritual life requires constant maintenance, constant cultivation and nurturing. The person who maintains their spiritual life will become extremely valuable as a result.
And on the reverse side of the table, when cultivation does not take place, then thorns and briers result. The land, or the soul of the individual, become worthless or without value.
And so it will be when Judah is overrun. The population will be decimated, leaving no one , or virtually no one, to cultivate and care for the vineyards, or anything else for that matter. The result, the land will be overrun with briers and thorns, and will become virtually useless. A vineyard that was once worth a thousand pieces of silver, will now be worth nothing. That is a dramatic drop in value, from one-thousand down to nothing.
In any decent economy, when times are tough, you can at least get fire sale prices for property, but when the prices drive down to zero, then that indicates phenomenal destruction and desolation. Not to mention that there will be virtually no one to even make an offer, nor anyone to receive an offer, and no one to do the work.
So, when you ignore or do not take care of your own soul, then you are more or less investing in your own destruction and worthlessness.
And note one important thing, your investment in your spiritual life, is more than just mere lip service, it is a commitment to a daily study, to constant residence in fellowship, to continual learning and growth each and every moment of the day, throughout your entire life.
The spiritual life is not a once a weekend activity, not a once reading through the Bible and then you know it, not a rendition of spiritual rhetoric, not the quoting of verses as though that will communicate wisdom.
The spiritual life is just like the garden that requires constant maintenance throughout the year. Let it go and weeds will overtake the garden, productivity will fall, and its value will vanish.
You are the garden, doctrine is the gardener the water the nutrition required. Withhold doctrine and you will have what?
End of study