"A house divided against itself cannot stand." I believe this government cannot endure, permanently half slave and half free. I do not expect the Union to be dissolved — I do not expect the house to fall — but I do expect it will cease to be divided. It will become all one thing or all the other.

In this famous statement, Lincoln is quoting the response of Jesus Christ to those who accused him of being able to cast out devils because he was empowered by the Prince of devils, recorded in Matthew 12:25: "And Jesus knew their thoughts, and said unto them, Every kingdom divided against itself is brought to desolation; and every city or house divided against itself shall not stand".