There are several of these subtle, invisible substances but little understood as yet by man, and their existence is only demonstrated by their effects. Some of them are recognized under the several terms, electricity, galvanism, magnetism, animal magnetism, spiritual magnetism, essence, spirit, &c. The purest, most refined and subtle of all these substances, and the one least understood, or even recognized, by the less informed among mankind, is that substance called the Holy Spirit.
