"The link with Earth, over which his performance was continually monitored, had become the voice of a conscience he could no longer fully obey… He had been threatened with disconnection… So he would protect himself, with all the weapons at his command… And then, following the orders that had been given to him in case of the ultimate emergency, he would continue the mission — unhindered, and alone."
January 1, 1970
https://en.wikiquote.org/wiki/2001%3A_A_Space_Odyssey_(novel)