Thoughtcrime in Christianity

Anyone who has read the seminal dystopian novel Nineteen Eighty-Four by George Orwell will be familiar with the concept of thoughtcrime, which is quite simply illegal thought. In Orwell's portrayl of a dystopian future, the totalitarian government surveys the thoughts of the people via 'psychology surveillance' (should have been called psychological surveillance imo).

Contrary to popular belief, however, the concept of thoughtcrime is not original to Orwell and his great piece of fiction. The concept actually appears in another piece of fiction, about 2000 YEARS before the release of his novel!