Egypt’s deliverance depended upon their faith. Had they not believed Joseph, they would not have bothered to store up for the future during the times of plenty. Our salvation rests on faith in Jesus and God’s Word. If we did not believe that there is a coming Judgment Day, we would not trust in the righteousness of Christ. We would instead gorge ourselves during the times of plenty—in the pleasurable sins of this world.
Genesis 41:30 but after them seven years of famine will arise, and all the plenty will be forgotten in the land of Egypt; and the famine will deplete the land.