Knowledge comes at the price of suffering. 
It is useful to the knowledge-seeker if the suffering can be transferred elsewhere.

Galen demonstrating that the recurrent laryngeal nerves render an animal voiceless when cut. In other words, the pig cannot scream its pain. 1541 Junta edition of Galen's Works

Galen demonstrating that the recurrent laryngeal nerves render an animal voiceless when cut. In other words, the pig cannot scream its pain. 1541 Junta edition of Galen's Works

from the science journal  NATURE

from the science journal NATURE

 

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