Nor must we forget that in science there are no final truths.

Objects are what matter. Only they carry the evidence that throughout the centuries something really happened among human beings.

Scientific knowledge advances haltingly and is stimulated by contention and doubt.

How can my old photographs fail to create in me a feeling of emptiness and sorrow? They make me acutely aware that this second deprivation will be final this time.

No contact with savage Indian tribes has ever daunted me more than the morning I spent with an old lady swathed in woolies who compared herself to a rotten herring encased in a block of ice.

Enthusiastic partisans of the idea of progress are in danger of failing to recognize the immense riches accumulated by the human race. By underrating the achievements of the past, they devalue all those which still remain to be accomplished.

Language is a form of human reason, which has its internal logic of which man knows nothing.