Pauli comments on Van der Waerden's thesis that scientific thinking was originally "down-to-earth" and then developed a connection with mysticism.

Pauli writes about E. A. Burtt's "The Metaphysical Foundations on Modern Science". He criticizes the ascription of "ultimate reality and causal efficacy" to the world of mathematics, and comments on the distinctions science-theology, man-universe, and metaphysics-positivism.

Pauli writes about his lecture in Mainz, and asks for information about the following participants: Bense, Hall, Hartner and Kuypers.

Pauli comments on Heisenberg's article "The development of the interpretation of quantum theory", characterised as a complete discussion of the literature against the "Copenhagen interpretation". Pauli agrees with Heisenberg that the "Copenhagen interpretation" is not positivist.

Pauli criticizes a work (not cited) by E. H. Hutton. Among other things, Pauli claims that there is no universal relation between the concept "elementary particle" and the exclusion principle, and that the concept "elementary particle" should be used to define fermions and bosons, or be abandoned.

Pauli comments on a lecture. He emphasizes that sciences wish to be integrated as part of a "bigger whole", but that today's philosophy is unable to do this. He also tries to interpret Kröner's conception of the neutrality of physics towards the world view.

Pauli gives references concerning the "concept of reality" (Wirklichkeit) in quantum mechanics: a 1927 Solvay report, an article by Bohr, and Pauli's lecture "Theory of relativity and science" (Bern 1955).

Pauli writes about E. J. Dijksterhuis' book "Die Mechanisierung des Weltbildes". He comments on Dijksterhuis' understanding of Newton, Galileo, Kepler, Mach, Einstein, etc, and on the concept of hazard, the relationship between science and religion, etc.

Pauli mentions Kröner's illness, two long letters from Pauli to Kröner concerning Galileo and Nicholas of Cusa, and a lecture by Pauli on the neutrino.

Pauli discusses metaphysics, positivism, science and ethics, etc.