Now if a clairvoyant watches what is done when a sacrament is taking place, he sees that on the repetition of the words of consecration and the making of the sign of power a visible change occurs in the consecrated object. It is most marked if we turn to the Mass, or Holy Communion. You have there on the altar the sacred elements—the bread and the wine. According to the Roman Catholic doctrine, at the words of power, what is called “transubstantiation” takes place. That teaching has been very much misunderstood by the ordinary Protestant. He does not realise that in every visible object there is an invisible and formative idea; that that idea, working along ordinary lines, produces one of the ordinary objects that you see around you; but that if the idea be changed by the use of a word of power, a mantra, that that change of the idea produces a change of astral matter, and in the etheric and even dense physical matter also a change of vibration is set up. And although it is true that in the densest matter the vibration is not powerful enough to alter the arrangement of the particles, it is true that in all the most important part of that object a change has occurred, and it is that change which is indicated by the word “transubstantiation.” No instructed Roman Catholic ever was foolish enough to think anything save that which I am now putting to you. Now if that idea seems strange, let me remind you of a simple fact which will throw light on the whole thing. Students of organic chemistry are familiar with isometric compounds. Those compounds are made up of exactly the same number of the same chemical elements. Nevertheless, the chemist will tell you that according to the inner arrangement of those elements will be the qualities of the thing. You may have in some of the higher carbon compounds (even so low down as where you have entering into the base only four carbon atoms) an arrangement or rearrangement of those elements such as to give you entirely different qualities—in one case a poison, in the other harmless. That change of arrangement makes all the difference. Is it so strange, then, that in changing the inner arrangement the qualities change? In the invisible worlds these things can be seen, so that that piece of opaque bread, when the words are spoken, utterly changes in appearance, becoming luminous and shining out in every direction. Now the moment one sees that, one begins to realise what a sacrament means from the material standpoint. You are dealing with an object that can be changed in its qualities. You are reconstituting the subtle portions of that by the forces you are bringing to bear on it. With what object? In order that, from the planes above the mental, spiritual power pouring down may find a vehicle which is able to assimilate it and carry it down to the densest plane of matter, and by that vehicle may be passed on to those who are partakers of the sacrament. And not only do you see that change appearing in the elements, but you see also that that change draws to the altar numbers of those whom the Hindūs call Devas, and the Christians call Angels, who lend their powers to the helping of the worshippers, and change the atmosphere of the whole place to which they throng.