Thoughtcrime
From NewspeakWiki
Thoughtcrime (Newspeak: Crimethink) - To even consider any thought not in line with the principles of Ingsoc. Doubting any of the principles of Ingsoc. All crimes begin with a thought. So, if you control thought, you can control crime. "Thoughtcrime is death. Thoughtcrime does not entail death, Thoughtcrime is death.... The essential crime that contains all others in itself."
