“..the most dangerous animal in a zoo is Man.”

“We commonly say in the trade that the most dangerous animal in a zoo is Man.”

“In zoos, along with the animals, the humanity of man is also prisoned! No cage is humane!”

“Man is the most bungled of all the animals, the sickliest, and not one has strayed more dangerously from its instincts. But for all that, of course, he is the most interesting.”

“Every time you go to the zoo, you prolong the captivity of the animals there! If no one goes to the zoos, there will be no zoos! Destroying the evil is very simple and it is in your hand!”

“Just beyond the ticket booth Father had painted on a wall in bright red letters the question: DO YOU KNOW WHICH IS THE MOST DANGEROUS ANIMAL IN THE ZOO? An arrow pointed to a small curtain. There were so many eager, curious hands that pulled at the curtain that we had to replace it regularly. Behind it was a mirror.”