The sphinx atropos squeakes when hurt, nearly as loud as a mouse, which, when uttered in the most plaintive tone, naturally shocks the human heart, and makes it shudder at the thought of destroying inoffensive animals merely for the sake of curiosity. I cannot help reflecting on this tyranny, this wanton cruelty, exercised by thoughtless man, on many animals, but especially in insects: 'tis certain, that every animal possessing life, has feeling; and, therefore, is as capable of suffering pain, as of enjoying pleasure; and, as Shakespeare humanely expresses “The poor beetle crushed beneath the foot, feels the pangs of death as great as when a monarch falls.” Gentle reader, pardon this digression, my feelings commanded my pen.
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The Genera Insectorum of Linn?us, Exemplified by Various Specimens English Insects drawn by Nature (1781)James Barbut
One thing I have frequently observed in children, that when they have got possession of any poor creature, they are apt to use it ill: they often torment, and treat it very roughly, young birds, butterflies, and such other poor animals which fall into their hands, and that with a seeming kind of pleasure. This I think should be watched in them, and if they incline to any such cruelty, they should be taught the contrary usage. For the custom of tormenting and killing of beasts, will, by degrees, harden their minds even towards men; and they will delight in the suffering and destruction of inferior creatures, will not be apt to be very compassionate or benign to those of their own kind. Our practice takes notice of this in the exclusion of butchers from juries of life and death.
John Locke
A person who feels pleasure in producing pain in someone else in a sexual relationship is also capable of enjoying as pleasure any pain which he may himself derive from sexual relations. A sadist is always at the same time a masochist.
Sigmund Freud
The lower animals, like man, manifestly feel pleasure and pain, happiness and misery. Happiness is never better exhibited than by young animals, such as puppies, kittens, lambs, &c., when playing together, like our own children. Even insects play together, as has been described by that excellent observer, P. Huber, who saw ants chasing and pretending to bite each other, like so many puppies.
Charles Darwin
Our planet, the Earth, is, as far as we know, unique in the universe. It contains life. Even in its most barren stretches, there are animals. Around the equator, where those two essentials for life, sunshine and moisture, are most abundant, great forests grow. And here plants and animals proliferate in such numbers that we still have not even named all the different species. Here, animals and plants, insects and birds, mammals and man live together in intimate and complex communities, each dependent on one another. Two thirds of the surface of this unique planet are covered by water, and it was here indeed that life began. From the oceans, it has spread even to the summits of the highest mountains as animals and plants have responded to the changing face of the Earth.
David Attenborough
The Roman public's thirst for blood and pleasure in witnessing pain seems to have been unquenchable and without limit." "The caged animals were kept in dungeons below the main arena. The terrified animals in their cages were hoisted up from this pit. And not only animals, human beings too, criminals, slaves and prisoners of war. And here in this arena they were set one upon the other to provide the crowd with spectacles of the most appalling carnage. It still continues to this day in Spain.
David Attenborough
Barbut, James
Barclay, William
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