Final answer:
Lincoln's address incorporates a central idea of an impartial divine providence and the notion of charity, calling for empathy and reconciliation among Americans. He develops these by invoking shared values and humanity, suggesting that reliance on God .
Step-by-step explanation:
In the third paragraph of Abraham Lincoln's address, one central idea about God is the notion that divine providence is not aligned with the interests of any one faction or group, suggesting a more universal and impartial role of God in the affairs of the nation.
Another central idea related to charity in the fourth paragraph is Lincoln's call for mutual empathy and reconciliation amidst a nation in conflict. He expresses the belief that despite the strained relations among Americans, they are connected by bonds of affection and shared history, which could, in time, heal divisions.
Lincoln develops these ideas by invoking imagery that appeals to shared memory and common humanity, articulating that the 'better angels of our nature' could guide the nation towards unity. He employs a charitable and conciliatory tone, aiming to soothe the tensions and conflict, implying that both reliance on God's impartial wisdom and an embrace of charity towards one another are essential for the nation's healing.
The two ideas are connected in suggesting that it is through divine providence and human compassion that a deeply divided nation can find a path to reconciliation and a stronger union.