Although dreams are something which is known to everybody, the study of them leads to the deeper side of life; for it is from the meaning of the dream that one begins to realize two things: that something is active when the body is asleep, and to the deep thinker this gives faith in the life hereafter. For the dream is the proof that when the body is not active, a person is active all the same, and seems to be no less active than in the physical body. If one detects any difference, it is a difference of time, for in dreams a man may pass from one land to another in a flash instead of taking a month.