This letter is mostly about Oppenheimer, his present situation and his future.

Pauli criticises Jung's theory of the closed circle, but in spite of this he thinks that the concept of the Collective Unconscious is correct and plausible. He gives a detailed discussion of this concept and modifications. He makes parallels between micro-physics and psychology of the unconscious which deal with an invisible reality. He writes about Bohr's political activity and the reaction to it.

Pauli writes about Heisenberg's paper in: Z. Naturforsch.

Pauli declines Born's proposition to become a member of a "political party with a red stamp" or to sign "any open letter". Instead of taking part to a East-West world division, Pauli would more encourage a synthesis between asiatic wisdom and occidental sciences, which is more application oriented. He gives some thoughts on the behavior of a scientist on political questions. He also talks about his interest in Fröhlich's theory of supraconductivity.

Pauli gives details of his discussion with Dyson about his definition of renormalization through power-series.

Pauli writes on a talk he had with Bargmann on group theoretical problems.