“And anyone who lacks the ability to don blinkers for once and to convince himself that the destiny of his soul depends upon whether he is right to make precisely this conjecture and no other at this point in his manuscript should keep well away from science. He will never be able to submit to what we may call the 'experience' of science. In the absence of this strange intoxication that outsiders greet with a pitying smile, without this passion, this conviction that 'millennia had to pass before you were born, and millennia more must wait in silence' to see if your conjecture will be confirmed— without this you do not possess this vocation for science and should turn your hand to something else. For nothing has any value for a human being as a human being unless he can pursue it with passion.”