Despite the many hints that House Atreides has learned about the significance of water since they moved to Arrakis, the spitting scene indicates that none of them truly understand its importance. Jessica and Paul will soon come to realize water’s value firsthand when they must escape the Harkonnen forces by fleeing into the desert. However, at this time, the cultural differences between Fremen and House Atreides are taking too long to work out, and Duke Leto will not be able to protect his people.