It is essential to happiness that our way of living should spring from our own deep impulses and not from the accidental tastes and desires of those who happen to be our neighbors, or even our relations.

To expect a personality to survive the disintegration of the brain is like expecting a cricket club to survive when all of its members are dead.

Every great idea starts out as a blasphemy.

If I were a medical man, I should prescribe a holiday to any patient who considered his work important.

Life and hope for the world are to be found only in the deeds of love.

Our use of the phrase 'The Dark Ages' to cover the period from 600 to 1000 marks our undue concentration on Western Europe. [...] From India to Spain, the brilliant civilisation of Islam flourished. What was lost to Christendom at this time was not lost to civilisation, but quite the contrary. [...] To us it seems that West-European civilisation is civilisation, but this is a narrow view.

Even when the experts all agree, they may well be mistaken.