pbar wrote:
Hehehe, that should be a line in a famous movie.

It's a play on something Master Qui-Gonn says to his padawan, Obi-Wan Kenobi, in Episode I.
  

"Logical! If they were logical, they wouldn't be human!
They are driven by strange impulses"
General Urko (Mark Lenard), Planet of the Apes TV series, "The Surgeon". (1974).