Third Lecture

At most, minds like Hume or Kant will have difficulties because they confuse what follows from each other. No one will consider the day as the cause of the night and the night as the cause of the day. Day and night arise one after the other. Day arises from the sun rising above the horizon, and night from the sun going below the horizon. The sun's standing above the horizon is the cause of day, and the sun's going below the horizon is the cause of night. Just as night is not the cause of day, or day the cause of night, so it is not essentially true that waking is the cause of sleeping or sleeping the cause of waking. Rather, it is rhythmic states that alternate, just as the positions of the sun above and below the horizon alternate, and these have nothing to do with a cause-and-effect relationship.