But while the Bible is not uniform, it is unified. The many books of the one Bible are not like the many pennies in the one jar. The pennies in the jar look the same, yet are disconnected; the books of the Bible (like the organs of a body) look different, yet are interconnected. As the past two generations' recovery of biblical theology has shown time and again, certain motifs course through the Scripture from start to end, tying the whole thing together into a coherent tapestry--kingdom, temple, people of God, creation/new creation, and so on.
Yet underneath and undergirding all of these, it seems to me, is the motif of God's grace, his favor and love to the undeserving. Don't we see the grace of God in every book of the Bible? (NT books include the single verse that best crystallizes the point.)
Genesis shows God’s grace to a universally wicked world as he enters into relationship with a sinful family line (Abraham) and promises to bless the world through him.Read the rest of his list here.
Exodus shows God’s grace to his enslaved people in bringing them out of Egyptian bondage.
Leviticus shows God’s grace in providing his people with a sacrificial system to atone for their sins.
Numbers shows God’s grace in patiently sustaining his grumbling people in the wilderness and bringing them to the border of the promised land not because of them but in spite of them.
Deuteronomy shows God’s grace in giving the people the new land 'not because of your righteousness' (ch. 9).
Joshua shows God’s grace in giving Israel victory after victory in their conquest of the land with neither superior numbers nor superior obedience on Israel’s part..."