It is therefore easy to see why the churches have always fought science and persecuted its devotees. On the other hand, I maintain that the cosmic religious feeling is the strongest and noblest motive for scientific research. Only those who realize the immense efforts and, above all, the devotion without which pioneer work in theoretical science cannot be achieved are able to grasp the strength of the emotion out of which alone such work, remote as it is from the immediate realities of life, can issue. What a deep conviction of the rationality of the universe and what a yearning to understand, were it but a feeble reflection of the mind revealed in this world, Kepler and Newton must have had to enable them to spend years of solitary labor in disentangling the principles of celestial mechanics! Those whose acquaintance with scientific research is derived chiefly from its practical results easily develop a completely false notion of the mentality of the men who, surrounded by a skeptical world, have shown the way to kindred spirits scattered wide through the world and through the centuries. Only one who has devoted his life to similar ends can have a vivid realization of what has inspired these men and given them the strength to remain true to their purpose in spite of countless failures. It is cosmic religious feeling that gives a man such strength. A contemporary has said, not unjustly, that in this materialistic age of ours the serious scientific workers are the only profoundly religious people.

Lavoisier was right in the deepest, almost holy, way. His passion harnessed feeling to the service of reason; another kind of passion was the price. Reason cannot save us and can even persecute us in the wrong hands; but we have no hope of salvation without reason. The world is too complex, too intransigent; we cannot bend it to our simple will.

Nothing got him angrier than when people implied he was paranoid. It made him feel persecuted.

Society is becoming increasingly aware of the power of science to bring weal or woe to mankind. But now when it is seen that the same science that brings prosperity and comfort may lead to depression and discomfort, men are beginning to look with mixed feelings at this monster which society may exalt or persecute, but cannot view with indifference. Perhaps my topic today should have read “Ought Scientists to be Burnt at the Stake?” I shall not attempt to decide this question, but only to present in a cursory way some of the pros and cons … But if scientists are to be destroyed, let them not alone by the victims; every creative thought must be extirpated. A philosopher’s epigram may kindle a world war. So scientist, inventor, artist, poet and every sort of troublous enthusiast must together be brought before the bar of the new inquisition

The Catholic Church excommunicated Copernicans, the Communist Party persecuted Mendelians on the ground that their doctrines were pseudoscientific. The demarcation between science and pseudoscience is not merely a problem of armchair philosophy: it is of vital social and political relevance.

Under the flag of science, art, and persecuted freedom of thought, Russia would one day be ruled by toads and crocodiles the like of which were unknown even in Spain at the time of the Inquisition.