Matthew 5:13 Ye are the salt of the earth: but if the salt have lost his savor, wherewith shall it be salted? it is thenceforth good for nothing, but to be cast out, and to be trodden under foot of men.
[Patriarchs & Prophets pp 369>370] Like their Master, the followers of Christ in every age were to be the light of the world. The Savior said, “A city that is set on an hill cannot be hid. Neither do men light a candle, and put it under a bushel, but on a candlestick; and it giveth light unto all that are in the house”—that is, in the world. And He adds, “Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven.” Matthew 5:14-16.
This is just what Enoch, and Noah, Abraham, Joseph, and Moses did. It is just what God designed that His people Israel should do. It was their own evil heart of unbelief, controlled by Satan, that led them to hide their light, instead of shedding it upon surrounding peoples; it was that same bigoted spirit that caused them either to follow the iniquitous practices of the heathen or to shut themselves away in proud exclusiveness, as if God's love and care were over them alone.
As the Bible presents two laws, one changeless and eternal, the other provisional and temporary, so there are two covenants. The covenant of grace was first made with man in Eden, when after the Fall there was given a divine promise that the seed of the woman should bruise the serpent's head. To all men this covenant offered pardon and the assisting grace of God for future obedience through faith in Christ. It also promised them eternal life on condition of fidelity to God's law. Thus the patriarchs received the hope of salvation.
Hebrews 8:10 For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people.
May God add His blessing to the study of His word. “Good night” and God bless!