Another example of endless repetitive activity is seen in the conveyor-belt processes of the seas and the rivers. The rivers are constantly flowing and carrying vast quantities of water into the sea as any layman can observe, and yet the sea level remains the same and the sea does not fill up.
All man’s labour is still subject to the same limitations. He may succeed in placing men on the moon and creating a worldwide internet; he may be able to probe the secrets of DNA and to manipulate this for his advantage, but none of this sets him free from his inner limitations. He cannot remove injustice from the world, he cannot do away with poverty; nor can he create a righteous society or put an end to war, cruelty and bloodshed. Significant scientific discoveries which could be used to solve some of these problems are instead soon made to serve greed, oppression, or put to destructive ends. The discovery of nuclear fission is immediately used to form new weapons more terrible than any that existed before; the internet becomes a source of hate propaganda, unsolicited and unwelcome advertising material, and perfidious and destructive pornography. Who knows where the discovery of molecular reproduction will take us?
Man cannot free himself from slavery to sin; he cannot reverse the ageing process; he cannot prevent the eventual failure of the body resulting in death, and when he dies he cannot take anything that he has accumulated in this world with him.