Pauli writes about an intervention in Bern for a colleague.

Heisenberg states his view on the question of the field theory and emphasizes the significance of the Möller-Kristensen theory as a well analyzed example for further theories of this type.

Pauli makes further remarks on the subject of his last letter (15 October 1952).

Pauli gives further analysis of the entropy concept. The entropy of an ensemble is identical with the entropy of a single system. This under the condition that it concerns the measure of the information corresponding to the same ensemble.

fierz_0092-106: Pauli writes about the contrast between Kepler and Fludd. He sees both contrary positions in himself. He thinks that there may be a possible relation of his dreams to this. He also makes a connection with problems touched upon in Jung's book "Answer to Job". fierz_0092-107: Pauli offers an essay on the striving for wholeness in physics and the conflict between science and intuitive feeling. He writes on the psycho-physical problem and on science and Neoplatonism. He adds to this some special references to Pauli's book on Kepler.

Pauli comments on Källén's paper. There are differences between his part I and part II. He talks about states with one electron-positron pair and about Dyson's view that only renormalized interactions existing in nature.