I am approached with the most opposite opinions and advice, and that by religious men, who are equally certain that they represent the Divine will. I am sure that either the one or the other class is mistaken in the belief, and perhaps in some respects both. I hope it will not be irreverent for me to say that if it is probable that God would reveal his will to others, on a point so connected with my duty, it might be supposed he would reveal it directly to me; for, unless I am more deceived in myself than I often am, it is my earnest desire to know the will of Providence in this matter. And if I can learn what it is I will do it! These are not, however, the days of miracles, and I suppose it will be granted that I am not to expect a direct revelation. I must study the plain physical facts of the case, ascertain what is possible and learn what appears to be wise and right. The subject is difficult, and good men do not agree.

Abraham Lincoln (1809-1865) American lawyer, politician, US President (1861-65)

Speech (1862-09-13) to the Emancipation Memorial presented by Chicago Christians of All Denominations.
    (Source)

From a report of the delegation that presented Lincoln with a memorial in favor of national emancipation. The report, detailing Lincoln's comments and their replies, was presented to the sending parties on 1862-09-20, and released to newspapers over the following days.