Deuteronomy 11:12
A land which the LORD thy God careth for: the eyes of the LORD thy God are always upon it, from the beginning of the year even unto the end of the year. A land which the LORD thy God careth for: the eyes of the LORD thy God are always upon it, from the beginning of the year even unto the end of the year.
The promised land stands under God's continual care, with His eyes and attention resting upon it always throughout the whole year, from its beginning to its end. That land is Canaan, the country God was bringing Israel to and guiding them to while they were still wandering in the wilderness, a land flowing with milk and honey. It was the same land Moses was shown viewing from Mount Nebo, over which God's watch extends through every part of the year.
Unlike Egypt, where sown seed was watered by foot as a garden of herbs by laborious irrigation from the river, the Nile, Canaan is a land of hills and valleys that drinks water of the rain of heaven. God's care means providing abundance of rain in its due season, the first rain and the latter rain, so that vegetation flourishes. In this way there is corn and wine and oil and grass for cattle to eat and be full, so they need never suffer for lack of rain, giving abundant occasion for rejoicing.
Possession of the land and its fruitful provision were given on condition of diligently hearkening to His commandments and law to love and serve Him with all heart and soul. Turning aside to serve and worship other gods would bring a curse, kindling His wrath to shut up heaven so there would be no rain and the land would not yield fruit and they would perish quickly from the good land. Israel's wilderness history shows God's word against disobedience is fulfilled.
The instruction belongs to Deuteronomy 4-11 explaining God's dealings with His people, and its lessons of blessing through obedience apply to God's people now as they did to Israel. It applies directly to every soul carrying responsibilities in sanitarium work, with all directions from the greatest to what may seem the least to be carefully observed.