Pauli asks Fierz some personal questions regarding the chairs for theoretical physics in Zürich and Basel.

Pauli writes on Schopenhauer's philosophy in the light of modern physics and psychology. For Pauli Eros and Logos are complementary opposites.

Pauli discusses a second letter by Fierz on the entropy of a system which is not in equilibrium.

Pauli writes about the contents of his article on "Phenomenon and reality" and discusses again the problem of the relation between observer and observed object. He speculates on the possibility that in organic matter, i.e. life, there may exist an influence of the act of observation on the observer, which often could be of a negative, undesirable nature.

Pauli writes on Schopenhauer's philosophy and the analogy of his "will" to Jung's unconscious.

Pauli compares the roots of his metaphysical beliefs with those of Fierz. He also writes on the Jewish component in modern science.

Pauli writes about a possible successor for Speiser and on the english translation of his book on Kepler. Pauli is against separating his essay from Jung's, in spite of his reservations against Jung.

Pauli asks some questions concerning the connection between spin and statistics. He also quotes Schopenhauer about Plotinus.

Pauli makes a recapitulation of the axioms of the theory of probability and the law of large numbers and discusses the significance of the large deviation from the expected value. He also writes on the possibility of the influence on the results by the observer.