Ignorance per se is not nearly as dangerous as ignorance of ignorance.

When I hear somebody sigh, 'Life is hard,' I am always tempted to ask, 'Compared to what?'

The greatest enemy of progress is not stagnation, but false progress.

Most people are mirrors, reflecting the moods and emotions of the times; few are windows, bringing light to bear on the dark corners where troubles fester. The whole purpose of education is to turn mirrors into windows.

Filth is always a sign of weakness - in the mouth of the user and in the mind of the writer.

Democracy is the only system that persists in asking the powers that be whether they are the powers that ought to be.

The three hardest tasks in the world are neither physical feats nor intellectual achievements, but moral acts: to return love for hate, to include the excluded, and to say, 'I was wrong'.