If a house doesn't have walls then it cannot stand. DUH. The house referenced in the speech is a metaphoric house that is the United States of America. That house, the U.S., was, at the time, divided among itself about the issue of Slavery. It was proved three years later that Lincoln was exactly right. The United States of America went into war against itself about the issue of slavery, along with whether the Federal government should have more or less power, and, for the North, keeping the United States united.
During the Lincoln-Douglas debates in 1858, Lincoln used the "House divided against itself" statement as a reference to the issue of slavery. Lincoln was saying in effect that as long as the nation was fighting over the slavery issue, it would cause great harm to itself.
Abraham Lincoln
Abraham Lincoln
Lincoln spoke for about three minutes.
Tubbs
Gettysburg military cemetery
The President of the US, Abraham Lincoln.
George washington
Abraham Lincoln it was part of his Gettysburg address
Lincoln made his famous Gettysburg Address on this occasion.
Abraham Lincoln was considered a mysterious man because he was very thoughtful before he spoke. It was clear to others he was always pondering, but not always sharing his thoughts.
Abraham Lincoln spoke out against it when he was a Whig Congressman.