14. As a mean of elaboration, Spiritism proceeds in exactly the same course as the exact sciences; that is to say, it implies the experimental method. Some facts of a new order present themselves, which cannot be explained by known laws. It teaches us to observe, compare, analyze them, and from effects, arrive at causes; it reveals the laws which govern them; it then deduces the consequences, and seeks for useful applications; it establishes no one preconceived theory. Thus it has not presented as a hypothesis either the existence or intervention of spirits, neither the existence of the perispirit, or reincarnation, or any one principle of the doctrine. It has proved the existence of spirits in the beyond, and with it the other principles connected with the spiritual life. These are not facts which are revealed after a theory has been formed to confirm them; but the theory has subsequently arisen to explain the facts, and make a summary of them. It is rigorously exact to declare that Spiritism is a science of observation, and not the product of the imagination. Not until its studies were based on experimental methods did the sciences begin to make serious progress. Although it was believed that this method could only be applied to matter, it is just as well applied to metaphysical things.