"Surely these experiments show very clearly how the remembrance of our dreams becomes so chaotic and inconsequent as it frequently is. Incidentally they also explain why some people — in whom the ego is undeveloped and earthly desires of various kinds are strong — never dream at all, and why many others are only now and then, under a collocation of favourable circumstances, able to bring back a confused memory of nocturnal adventure; and we see, further, from them that if a man wishes to reap in his waking consciousness the benefit of what his ego [higher self/soul] may learn during sleep, it is absolutely necessary for him to acquire control over his thoughts, to subdue all lower passions, and to attune his mind to higher things. Chapter 7 Conclusion"