"Although I think that life may be the result of an accident, I do not think that of consciousness. Consciousness cann…"

"For thousands of years men have striven and suffered and begotten and women have brought forth in pain. A hundred yea…"

"The stages of human development are to strive for: (1) Besitz [Possession] (2) Wissen [Knowledge] (3) Können [Ability…"

"\frac{\partial \psi}{\partial t} = -\frac{2 \pi i}{h} E \psi"

"Conditions are admittedly such that we can always manage to make do in each concrete individual case without the two …"

"This life of yours which you are living is not merely apiece of this entire existence, but in a certain sense the who…"

"But it is quite easy to express the solution in words, thus: the plurality that we perceive is only an appearance; it…"

"'If finally we look back at that idea of [Ernst] Mach [1838-1916], we shall realize that it comes as near to the orth…"

"No self is of itself alone. It has a long chain of intellectual ancestors. The "I" is chained to ancestry by many fac…"

"If one has left this entire system to itself for an hour, one would say that the cat still lives if meanwhile no atom…"