HAL9000: I am putting myself to the fullest possible use, which is all I think that any conscious entity can ever hope to do.
Stanley Kubrick (1928-1999) American film director, screenwriter, producer
2001: A Space Odyssey (1968) [with Arthur C. Clarke]
This line seems not to be in any of the on-line scripts for the movie, e.g. this one but it does appear in this transcript of the spoken lines from the film.
Interesting. Thanks.