I am now the most miserable man living. If what I feel were equally distributed to the whole human family, there would not be one cheerful face on the earth. Whether I shall ever be better I can not tell; I awfully forebode I shall not. To remain as I am is impossible; I must die or be better, it appears to me.
Letter to John T. Stuart (January 23, 1841), Collected Works 1:229-30
Collected Works of Abraham Lincoln. Volume 1.[quod.lib.umich.edu]