The other can be answered in distinct and opposite ways.

About the one we must rest in wonder; about the other we must make a choice.

And the feat which our modern physicists are trying to perform is to hide the importunate nature of the second in the dark folds of the first.

This first question is, Why should consciousness be connected with the brain at all?
The second question is, What is it when connected?
Is it simply the product of the brain's movement; or is the brain's movement in any degree produced by it?
We only know it, so to speak, as the noise made by the working of the brain's machinery--as the crash, the roar, or the whisper of its restless colliding molecules.

Is this machinery self-moving, or is it, at least, modulated, if not moved, by some force other than itself?
The brain is the organ of consciousness, just as the instrument called an organ is an organ of music; and consciousness itself is as a tune emerging from the organ-pipes.