Abraham Lincoln Second Inaugural Address

[Amy L.]

For some months I've been reading Shakespeare's Sonnets - I apologize if I've already flagged this -
Can I ask - Does this analogy make sense in reference the North and South? Was a reference to Shakespeare in the Second Inaugural purposeful?
Might anyone have suggested reading, for good analysis of Lincoln's important addresses?

Sonnet 144: Two loves I have of comfort and despair
By William Shakespeare

Two loves I have of comfort and despair,
Which like two spirits do suggest me still
The better angel is a man right fair,
The worser spirit a woman coloured ill.
To win me soon to hell, my female evil
Tempteth my better angel from my side,
And would corrupt my saint to be a devil,
Wooing his purity with her foul pride.
And, whether that my angel be turn’d fiend,
Suspect I may, yet not directly tell,
But being both from me both to each friend,
I guess one angel in another’s hell.
Yet this shall I ne’er know, but live in doubt,
Till my bad angel fire my good one out.