'Ruin' in the Bible

they only kept hearing, “He who used to persecute us is now preaching the [good news of the] faith which he once was trying to destroy.”

For the one who sows to his flesh [his sinful capacity, his worldliness, his disgraceful impulses] will reap from the flesh ruin and destruction, but the one who sows to the Spirit will from the Spirit reap eternal life.