Tolerance always has limits – it cannot tolerate what is itself actively intolerant.
Everyone who remembers his own education remembers teachers, not methods and techniques. The teacher is the heart of the educational system.
To silence criticism is to silence freedom.
I was guilty of judging capitalism by its operations and socialism by its hopes and aspirations; capitalism by its works and socialism by its literature.
The difference between science and religion is that the former wishes to get rid of mysteries whereas the latter worships them.
To serve the public interest is not the same as being a servant of public opinion.