Gloomy Gus Mendelssohn


My latest blog post for The Jerusalem Post:

Do we survive bodily death?

There are reasons to think so, but nothing that qualifies as proof. Perhaps the most sensible attitude (because it’s mine) is that if we do survive death, then we’ll find out someday. If we don’t survive death, then we’ll never know, so it won’t bother us.

A kind of proof was offered by Moses Mendelssohn (1729-1786), the German Jewish philosopher whose fame was such that he was nicknamed “the Socrates of Berlin.”

However, Mendelssohn seemed so distressed by the subject of death that it reminded me of another nickname: “Gloomy Gus,” applied to people who obsess about the negative side of life.

He wrote about death in his 1767 book Phaedo, or Concerning the Immortality of the Soul (Phädon oder über die Unsterblichkeit der Seele). “Phaedo” refers to a dialogue by Plato in which Socrates, while he is dying, discusses the issue with his students.

Mendelssohn has two main arguments for the immortality of the soul. The first is metaphysical, but since it’s both complicated and unconvincing, I won’t inflict it on you. Immanuel Kant gives a fairly good summary of the argument in his Critique of Pure Reason (B-413).

The second argument is where Mendelssohn turns into a Gloomy Gus of major proportions. His argument isn’t very convincing either, but at least it’s interesting and you can understand what he’s talking about.

He seems to worry about death a lot more than a psychologically healthy person should:

“During happy times, the dreadful thought of nonexistence winds its way through the most delightful representations like a snake through flowers, and poisons the enjoyment of life. During unhappy times, such a thought dashes a man to the ground in complete hopelessness …”1

His basic argument, as far as I can tell, is this:

  1. If death is the end of us, then life is our ultimate good.
  2. If life is our ultimate good, then we have a right to do whatever is necessary to protect and prolong our lives.
  3. Each country has a right to demand that its citizens sacrifice their lives for their country.
  4. Our right to life conflicts with our countries’ right to demand that we sacrifice our lives.
  5. There are no irresolvable conflicts of rights.
  6. Therefore, death is not the end of us.

In this argument, Mendelssohn deduces a metaphysical conclusion (the soul is immortal) from a moral conundrum: if the soul isn’t immortal, then there are conflicts of rights.

The problem is that all of his premises are highly debatable. He might believe in them, but they require a lot more argument to convince anyone else.

I’m not sure that Mendelssohn himself thought his argument was valid. He might have thought that belief in immortality promoted happiness and moral behavior, so it was justified for him to use heavy-breathing rhetoric to convince people it was true.

In his “Open Letter to Lavater” (1769), he said that when truth conflicts with the social good, we should sometimes support the social good instead of the truth:

“Whoever cares more for the welfare of mankind than for his own renown will keep a rein on his opinions concerning … erroneous religious opinions that are accidentally connected to the promotion of the good.”2

Mendelssohn seems to have been a wise man: indeed, wiser than we might think from reading his shaky argument in favor of human immortality.

Works Cited

Gottlieb, M., editor (2011), Moses Mendelssohn: Writings on Judaism, Christianity, and the Bible. Lebanon: Brandeis University Press.


  1. Gottlieb, M. (2011), p. 246. 
  2. Gottlieb, M. (2011), p. 12. 

About N.S. Palmer

N.S. Palmer is an American mathematician.
This entry was posted in Jewish Philosophy, Judaism, Philosophy, The Jerusalem Post and tagged , , , , , . Bookmark the permalink.

2 Responses to Gloomy Gus Mendelssohn

  1. An interesting discussion. I don’t know enough about Jewish philosophy to say, but from a logical paradigm, his argument is not very convincing.

    He presupposes that the government has the right to a citizen’s life. It would seem that the right comes either from voluntary submission (as with a representative government) or by some kind of divine right, as was commonly claimed then. If neither of these was the case, the government would not seem to have the right after all. If either was true, then the government’s right would trump that of the citizen.

    I find it interesting that a Jewish philosopher would attack the issue of life after death without any reference to the divine. But as I began, my background in Jewish philosophy is lacking. Which is why I enjoy reading these pieces.


    • N.S. Palmer says:

      Hi, JP — Thanks for the perceptive comment!

      Mendelssohn was as much a German intellectual leader as he was a Jew, so he had to balance those two worlds very carefully. His most surprising claim was that Judaism had no required beliefs, only required actions (to obey the 613 commandments of traditional Judaism). That allowed him to avoid debates about God’s existence and many other matters of conventional faith, both Jewish and Christian.

      Liked by 1 person

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.