William H. Herndon, Jesse William Weik, Herndon's Lincoln: The True Story of a Great Life, Etiam in minimis major, The History and Personal Recollections of Abraham Lincoln by William H. Herndon, for twenty years his friend and Jesse William Weik

You ask me whether he changed his religious opinions towards the close of his life. I think not. As he became involved in matters of the greatest importance, full of great responsibility and great doubt, a feeling of religious reverence, a belief in God and his justice and overruling power increased with him. He was always full of natural religion; he believed in God as much as the most approved Church member, yet he judged of Him by the same system of generalization as he judged everything else. He had very little faith in ceremonials or forms. In fact he cared nothing for the form of anything. But his heart was full of natural and cultivated religion. He believed in the great laws of truth, and the rigid discharge of duty, his accountability to God, the ultimate triumph of the right and the overthrow of wrong. If his religion were to be judged by the lines and rules of Church creeds he would fall far short of the standard; but if by the higher rule of purity of conduct, of honesty of motive, of unyielding fidelity to the right, and acknowledging God as the supreme ruler, then he filled all the requirements of true devotion, and his whole life was a life of love to God, and love of his neighbor as of himself.

Yours truly,