In Lincoln's day a President's religion was a very private affair. There were no public prayer meetings no attempts to woo the Religious Right. Few of Lincoln's countrymen knew anything at all of his religious beliefs.
Religion is run by thought police. 'Obey. Listen. This is what you do. Don't ask questions. Go die for your country.' The spirituality says 'Okay you can die for your country but know what you're doing while you're doing it.'
