It may mean what is ordinarily understood by the word - climate, rainfall, railway rates or anything else except " indestructible powers of the soil."
Very few have any reference to Christianity, but they served as indestructible marks for indicating the position of interments in the catacombs.
It has been maintained since the times of the early Greek philosophers, and possibly even more remote ages, that matter is constituted of independent indestructible units, which cannot ever become divided by means of any mutual actions they can exert.
Indeed this is the fundamental idea of Origen - "the original and indestructible unity of God and all spiritual essences."
The existence of a fundamental principle, unalterable and indestructible, prevailing alike through physical and chemical changes, was generally accepted.