A fact, coming out the gate, this is not a good thing. It is often quoted; even by well know (Abraham Lincoln), and others, that lack Understanding. Let us, put on our Spiritual glasses, and seek Truth.
"A house divided" is from Matt.12:25, and Mark 3:25.
Immanuel-Christ-Jesus(I.C.J.) cast out a demon that had possessed a person, healed a blind, and dumb:and they were healed.
When the Pharisees heard it. What? The people were amazed, and gave HIM praise. It ticked off the Pharisees.
The context. They (Pharisees) accused "this fellow" ( I.C.J.) of being under the authority of Beelzebub, prince of the devils. Satan has been given limited authority over "kingdoms" = edu., economics, political, and religion.
Satan specializes in politics, and religion (Rev.13:1, 13:4).
I.C.J. warned Peter that Satan had ask for him: It wanted to sift him like wheat. Thereby Separations him into Denominations, aka religion.
This house divided is Satan's house. There is plenty confusion, and wicked fruit being produced inside this house: but it's difficult for those in the flesh to police themselves, with flesh.
They do stand; and it does stand - because Satan can Not change. It is the Tree of Knowledge, of good and evil.