that there is no limit either to the greatness or the minuteness of etheric vibrations, we can draw certain deductions from these premises. It is an established fact of ordinary science that, however closely particles of any substance may seem to cohere, they are in reality separated by interstices through which etheric waves can penetrate. The principle may be illustrated by the power of the X-rays to penetrate apparently solid bodies, such as iron. Then, if we combine with this the fact, that there is no limit to the minuteness of etheric waves, we see that however fine may be the particles constituting any form, it is always possible to have etheric waves still finer and thus able to penetrate that form and set up vibrations in it. It is our familiarity with the denser modes of matter that makes it difficult for us to grasp the idea of these finer activities; but there is nothing in what we know of the denser modes to contradict the conception; on the contrary, it is just by what we have learned of these denser modes that we reach the principles on which these further conceptions are founded. Looking at this, therefore, in the light of a mathematical proposition, there is absolutely no limit to the fineness of any form, or to its susceptibilities to etheric vibrations. Finally, to this add the power of the Word to start trains of etheric vibration, and you get the following series: The Word starts the etheric waves; these waves produce corresponding vibration in the soul of the subject; and the soul of the subject in turn communicates corresponding vibration to its body. We may thus explain the Creative Power of Thought on the basis of recognizable Law, and so we believe, because we know _why_ we believe, not because somebody else has told us so. Doubt is still the creative action of Thought, only it is creating negatively; so it is helpful to feel that we have some reason for confidence in the Power of the Word. There are a great many "Thomases" among us, and as one of the number I shall be glad if I can help my "Brother Tommies" to get a grip of the why and wherefore of the things which appear at first sight so fantastic and improbable.