The food that we may eat and the water we
may drink are dead, and as such they display absolutely no evidence of
nervous or mental processes. When they enter our bodies, they with other
foods replenish the various tissues, and among these the parts of the
brain. In a material sense they become actual living protoplasm, replacing
the worn-out substances destroyed during our previous thinking; and their
properties are combined to make brain and thought, to play for a time
their part in life, and to pass back into the world of dead, unthinking
things. Every one of us knows that hunger reduces our ability to think
clearly and fully, and every one knows also that mental vigor is renewed
when fresh supplies of nourishment reach the brain. What can be the source
of mentality, if it is not something brought in from the outer world along
with the chemical substances which taken singly are devoid of mind?
Scientific monism frankly replies that it is unable to find another
origin.
We are thus brought to recognize, not only the continuity taught by
organic evolution, but also the uniformity of the materials constituting
the entire sensible world, inasmuch as the ultimate unit of all nervous
phenomena is the reflex act of a protoplasmic mass, which itself is a
synthesis of properties inhering in the chemical elements making up living
matter.
Pages:
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309