"Without darkness there would be no concept of light For light to be self aware it must have its opposite—darkness."

"Even aperson deprived of his own ideas and individuality, at the very moment he gains power, acquires substance and c…"

"Grübeleien darüber, was man hätte tun und was man hätte lassen sollen, sie führen zu nichts."

"Der Instinkt ist keineswegs immer ein guter Ratgeber."

"It is true that mathematics, owing to the fact that its whole content is built up by means of purely logical deductio…"

"Mathematical knowledge, therefore, appears to us of value not only in so far as it serves as means to other ends, but…"

"Out of the interaction of form and content in mathematics grows an acquaintance with methods which enable the student…"

"I have come to the conclusion that the exertion, without which a knowledge of mathematics cannot be acquired, is not …"

"It may be asserted without exaggeration that the domain of mathematical knowledge is the only one of which our otherw…"

"If in Germany the goddess Justitia had not the unfortunate habit of depositing the ministerial portfolios only in the…"