Ludwig Wittgenstein Quotes
Russell's books should be bound in two colours, those dealing with mathematical logic in red - and all students of philosophy should read them; those dealing with ethics and politics in blue - and no one should be allowed to read them.
Drury, Maurice O'C. "Conversations with Wittgenstein." Recollections of Wittgenstein, edited by Rush Rhees, Oxford University Press, 1984, p. 112.
Actually, in the modern English tradition there is no censorship of library materials, but for many countries including some democracies, there is library censorship including some in the United States. However, the Internet has become the most democratic as government censorship is even harder, but still China, Saudi Arabia, and some other countries even censor the Internet.
Ludwig Josef Johann Wittgenstein was an Austrian-British philosopher who worked primarily in logic, the philosophy of mathematics, the philosophy of mind, and the philosophy of language.