“Enlarge this meditation upon this great world, man, so far, as to consider the immensity of the creatures this world produces; our creatures are our thoughts, creatures that are born giants; that reach from east to west, from earth to heaven, that do not only bestride all the sea and land, but span the sun and firmament at once; my thoughts reach all, comprehend all. Inexplicable mystery; I their creator am in a close prison, in a sick bed, anywhere, and any one of my creatures, my thoughts, is with the sun, and beyond the sun, overtakes the sun, and overgoes the sun in one pace, one step, everywhere.”

Speech in reply to Senator Stephen Douglas in the Lincoln-Douglas debates http://www.bartleby.com/251/1003.html of the 1858 campaign for the U.S. Senate, at Chicago, Illinois (10 July 1858)
1850s, Lincoln–Douglas debates (1858)
Context: My friend has said to me that I am a poor hand to quote Scripture. I will try it again, however. It is said in one of the admonitions of our Lord, "As your Father in Heaven is perfect, be ye also perfect." The Saviour, I suppose, did not expect that any human creature could be perfect as the Father in Heaven; but He said, "As your Father in Heaven is perfect, be ye also perfect." He set that up as a standard; and he who did most toward reaching that standard, attained the highest degree of moral perfection. So I say in relation to the principle that all men are created equal, let it be as nearly reached as we can. If we cannot give freedom to every creature, let us do nothing that will impose slavery upon any other creature. Let us then turn this Government back into the channel in which the framers of the Constitution originally placed it. Let us stand firmly by each other. If we do not do so we are turning in the contrary direction, that our friend Judge Douglas proposes — not intentionally — as working in the traces tend to make this one universal slave nation. He is one that runs in that direction, and as such I resist him. My friends, I have detained you about as long as I desired to do, and I have only to say, let us discard all this quibbling about this man and the other man; this race and that race and the other race being inferior, and therefore they must be placed in an inferior position; discarding our standard that we have left us. Let us discard all these things, and unite as one people throughout this land, until we shall once more stand up declaring that all men are created equal. My friends, I could not, without launching off upon some new topic, which would detain you too long, continue to-night. I thank you for this most extensive audience that you have furnished me to-night. I leave you, hoping that the lamp of liberty will burn in your bosoms until there shall no longer be a doubt that all men are created free and equal.