If ye walk in my statutes, and keep my commandments, and do them; then I will give you rain in due season, and the land shall yield her increase, and the trees of the field shall yield their fruit. And your threshing shall reach unto the vintage, and the vintage shall reach unto the sowing time; and ye shall eat your bread to the full, and dwell in your land safely. And I will give peace in the land, and ye shall lie down, and none shall make you afraid: and I will rid evil beasts out of the land, neither shall the sword go through your land. And ye shall chase your enemies, and they shall fall before you by the sword. And five of you shall chase a hundred, and a hundred of you shall put ten thousand to flight: and your enemies shall fall before you by the sword. For I will have respect unto you, and make you fruitful, and multiply you, and establish my covenant with you. And ye shall eat old store, and bring forth the old because of the new. And I will set my tabernacle among you: and my soul shall not abhor you. And I will walk among you, and will be your God, and ye shall be my people. But if ye will not hearken unto me, and will not do all these commandments; and if ye shall despise my statutes, or if your soul abhor my judgments, so that ye will not do all my commandments, but that ye break my covenant: I also will do this unto you; I will even appoint over you terror, consumption, and the burning ague, that shall consume the eyes, and cause sorrow of heart: and ye shall sow your seed in vain, for your enemies shall eat it. And I will set my face against you, and ye shall be slain before your enemies: they that hate you shall reign over you; and ye shall flee when none pursueth you. And I will break the pride of your power, and I will make your heaven as iron, and your earth as brass; and your strength shall be spent in vain: for your land shall not yield her increase, neither shall the trees of the land yield their fruits. And if ye walk contrary unto me, and will not hearken unto me; I will bring seven times more plagues upon you according to your sins. I will also send wild beasts among you, which shall rob you of your children, and destroy your cattle, and make you few in number; and your high ways shall be desolate. And if ye will not be reformed by me by these things, but will walk contrary unto me; then will I also walk contrary to unto you, and will punish ye yet seven times for your sins.
– Leviticus 26:3-12, 14-17, 19-24 (Second Reading of Vespers for the Eastern Church New Year)
This strikes me as a most worthy and necessary meditation for our times.