I went by the field of the slothful, and by the vineyard of the man void of understanding; And, lo, it was all grown over with thorns, and nettles had covered the face thereof, and the stone wall thereof was broken down. Then I saw, and considered it well: I looked upon it, and received instruction.
Proverbs 24 - v 30-32
Our souls are our fields and vineyards, which we are every one of us to take care of, to dress, and to keep. They are capable of being improved with good husbandry; that may be got out of them which will be fruit abounding to our account. We are charged with them, to occupy them till our Lord come; and a great deal of care and pains it is requisite that we should take about them.
These fields and vineyards are often in a very bad state, not only no fruit brought forth, but all overgrown with thorns and nettles (scratching, stinging, inordinate lusts and passions, pride, covetousness, sensuality, malice, those are the thorns and nettles, the wild grapes, which the unsanctified heart produces), no guard kept against the enemy, but the stone-wall broken down, and all lies in common, all exposed.
Matthew Henry