V. The Mystery of the Human Being

This is what I wanted to say, to start with. I shall come back to the question later. I would only like to add that Oskar Hertwig makes use of everything that even the most recent research has brought to light in order to prove that what Naegeli said was absolutely true, so that one can say that the present-day position of biological research shows that a study of the smallest living entities does not tell us any more than does a study of the various species that we can perceive quite normally. For these smallest living entities, the cells, are, according to Naegeli and Hertwig, just as different as are the species themselves. A study of them only teaches us that nothing can be discovered in this way that cannot also be discovered by our normal perception in looking at the ordinary world.