What is stunning about the guy (the ulimate master of the use of the English language for the ages) is that he was entirely self educated. His iron personal self discipline combined with his genius (both displayed time and again, and again), is simply not of this world.
...and his lows were really, really low. At one point he had contemplated suicide very early in his political career.
The Wills book, Lincoln at Gettysburg, is a fascinating study.
I'm off to work. Take care.