The best Abraham Lincoln film around is the new Spielberg film. It is very well researched, quotes from his life extensively, and a great film. It also focused on Lincoln's role in the passing of the 13th Amendment (outlawing slavery as the first constitutional mention of slavery) and his family life.
"With malice toward none, with charity for all, with firmness in the right as God gives us to see the right, let us strive on to finish the work we are in, to bind up the nation's wounds, to care for him who shall have borne the battle and for his widow and his orphan, to do all which may achieve and cherish a just and lasting peace among ourselves and with all nations."
"I have always found that mercy bears richer fruits than strict justice."
"We all declare for liberty; but in using the same word we do not all mean the same thing."
"Stand with anybody that stands right. Stand with him while he is right and part with him when he goes wrong."
"We begin with equality, it’s the origin, isn’t it? That’s justice. See, we’ve shown that if people can endure awful sacrifice and yet cohere."
Another terrific reference--
Abraham Lincoln: The Prairie Years and the War Years by Carl Sandberg
The book was a Pulitzer Prize winner and Sandberg interviewed people who knew Lincoln personally in compiling his account.