The body is, of course, but the new physical instrument of the old soul--an instrument, as certainly as the violin is the instrument and a vehicle for the musician's expression. At every turn our materialistic conceptions mislead us and prevent the perception of nature's truth. It is because we think of the body as being actually the person, that it seems improbable that an old soul has entered the infant body. We think of the power and intelligence of an old soul and then look at the baby and find no indication of such things. But that is only because the baby body is such a new and undeveloped instrument that it is at first useless and only slowly can it be brought under control of the soul and made to express its intelligence and power. The body is a growing instrument, not a completed one. Let us suppose that musical instruments grow as physical bodies do. Suppose there was a time when the piano was keyless, as a baby is toothless. Suppose that sounding boards have a period of immaturity and that the whole mechanism of the instrument is in a state that can only be characterized as infantile. If a master musician attempts to play on such a piano his performance would by no means be an indication of his ability. A competent critic who could hear the performance but not see the musician would promptly declare that no really great musician was touching the keys. And that is precisely the mistake we make in assuming that the immature body of an infant is capable of expressing the intellectual power of the old soul, or, to put it differently, denying that a returned, old soul is in possession of the infant body simply because there is no physical plane evidence of the fact. If pianos slowly grew to maturity then only when the instrument was mature could the master musician give a practical demonstration of his skill; and only when the physical body has reached its maturity can the soul that is using it fully express itself.