The dilemma is that science cannot accept being, life. You can cut a man in thousands of parts, you will not find life anywhere. In fact, you cannot put him back together again. Even if you glue him together again, life will not come back.
What is life? How can science accept it? It is beyond the scientist's grasp. So if he accepts it he accepts a limitation of science – and he accepts something higher than science. Then science cannot be the decisive factor in human life. This is against the ego of the scientist.