"I mean drugs, the chemical mixtures and injections that are so many people's only escape from the soul-crushing dreariness of their lives. Spook...Fury...'Slaught...psychshrooms...the strongest stimulants or depressants or hallucinogenics, creations that would kill a man after only a few doses, they do nothing to us. The only drug a Navigator is allowed besides alcohol is the Immaterium, the feelings we get from steering our way through the warp. It's a feeling impossible to describe to a normal like yourself - there would be only one way for you to experience it, and that would kill you."<br/><br/>He rubbed absentmindedly at the black leather cap covering his forehead, close to where his third eye was hidden beneath. Apparently unaware of doing so, he continued.<br/><br/>"We're made to be drawn to it and enjoy it. Not quite an addiction - it would not specifically harm me if I were to never leave the surface of a planet again - but I would forever feel empty and alone. Warp travel completes us, but like any drug, it has its aftereffects - in this case, the memories of what I see there, which remain after the euphoria has faded."