These Angels, unknown and unseen by you, prompt you to all good actions and dissuade you from Evil. They are with you in thought, and you often receive their warnings as if they were the promptings of your own Spirit. So they are, but the spirit which prompts is quite outside your own conscious self.

The guardian angel is indeed a kind of other self, a higher, purer, and more developed section of your own personality. This is perhaps a little difficult to understand, but it is true. There are, as well as good, evil angels who are with you no less constantly, and they are also sometimes visible as angels of darkness when you come across. They are with you always, and you are with them in the spirit world when you leave your body. 

The soul in the body hears but dimly, and does not see at all the innumerable influences with which it is surrounded. The first and most startling thing you have to learn is that your senses, materials senses, are not so much to help you to see and hear as to bar you off from seeing or hearing. 

The physical consciousness needs for its development the temporary seclusion of life from the realities of the world of spirit into which it is ushered at death. Hence, when you close your eyes in the sleep of death, it is more of a laying down of the blinkers that limited and confirmed your vision than almost anything else.

You then can see what were the sources of these vague impressions, intuitions, and aspirations, both up and down. You were in the midst of these beings always, but you mistook them for part of yourself. They are distinct, although united, for no one can live to himself alone.