Expressed in terms of this metaphor our two questions are as follows.

The first is, Why, when the air goes through them, are the organ-pipes resonant?
The second is, What controls the mechanism by which the air is regulated--a musician, or a revolving barrel?
Now what our modern physicists fail to see is, not only that these two questions are distinct in detail, but that also they are distinct in kind; that a want of power to answer them means, in the two cases, not a distinct thing only, but also an opposite thing; and that our confessed impotence to form any conjecture at all as to the first, does not in the least exonerate us from choosing between conjectures as to the second.
As to the first question, our discovery of the fact it is concerned with, and our utter inability to account for this fact, has really no bearing at all upon the great dilemma--the dilemma as to the unity or the dualism of existence, and the independence or automatism of the life and will of man.

All that science tells us on this first head the whole world may agree with, with the utmost readiness; and if any theologian '_hacks and scourges_' Dr.Tyndall for his views thus far, he must, beyond all doubt, be a very foolish theologian indeed.

The whole bearing of this matter modern science seems to confuse and magnify, and it fancies itself assaulted by opponents who in reality have no existence.
Let a man be never so theological, and never so pledged to a faith in myths and mysteries, he would not have the least interest in denying that the brain, though we know not how, is the only seat for us of thought and mind and spirit.

Let him have never so firm a faith in life immortal, yet this immortal has, he knows, put on mortality, through an inexplicable contact with matter; and his faith is not in the least shaken by learning that this point of contact is the brain.