This excerpt from Civilization in Transition (The Collected Works of C. G. Jung, Volume 10), page 20, paragraphs 27 and 28 is both right and wrong (italics, his):
One is reminded of the story of a young rabbi who was a pupil of Kant's. One day an old rabbi came to guide him back to the faith of his fathers, but all arguments were in vain. At last the old rabbi drew forth the ominous shofar, the horn that is blown at the cursing of heretics (as happened to Spinoza), and asked if the young man knew what it was. "Of course I know," answered the young man coolly, "it is the horn of a ram." At that the old rabbi reeled back and fell to the ground in horror.
What is the shofar? It is also the horn of a ram. Sometimes a symbol can be no more than that, but only when it is dead. The symbol is killed when we succeed in reducing the shofar to a ram's horn. But again, through symbolization, a ram's horn can become the shofar.