“I should wish, however, to know what this reason is, through which we are more excellent than all the tribes of animals. Is it because we have made for ourselves houses, by which we can avoid the cold of winter and heat of summer? What! do not the other animals show forethought in this respect? … But if nature, which gave them life, had chosen to give to them also hands to help them, they too would, without doubt, raise lofty buildings and strike out new works of art. Yet, even in those things which they make with beaks and claws, we see that there are many appearances of reason and wisdom which we men are unable to copy, however much we ponder them, although we have hands to serve us dexterously in every kind of work.”

“Man only is endowed with wisdom so as to understand religion, and this is the principal if not the only difference betwixt him and dumb animals; for other things that seem peculiar to him, though they are not the same in them, yet they appear to be alike … What is there more peculiar to man than reason, and foresight? Yet there are animals which make several different ways of retiring from their dens; that when in danger they may escape; which without understanding and forethought they could not do. Others make provision for the future.”
Solus (homo) sapientia instructus est ut religionem solus intellegat, et haec est hominis atque mutorum vel praecipua, vel sola distantia; nam caetera quae videntur hominis esse propria, etsi non sint talia in mutis, tamen similia videri possunt … Quid tam proprium homini quam ratio, et providentia futuri? Atqui sunt animalia, quae latibulis suis diversos, et plures exitus pandant; ut si quod periculum inciderit, fuga pateat obsessis; quod non facerent, nisi inesset illis intelligentia, et cogitatio. Alia provident in futurum.

Lactantius (250–325) Early Christian author

“The best part of our misfortunes - our moral unhappiness, I mean - comes from the fact that we have words to describe them… We give them body, we even go so far as to give them a body which is not their own, for the words of common language do not always correspond to our sufferings, which may be of a new and distinct sort. … And then, too, words prolong and preserve sorrows that should long have been forgotten. Animal nature forgets….”

André Maurois (1885–1967) French writer

“Philosophers have always tried to show that we are not like other animals, sniffing their way uncertainly through the world. Yet after all the work of Plato and Spinoza, Descartes and Bertrand Russell we have no more reason than other animals do for believing that the sun will rise tomorrow.”

John Gray book Straw Dogs: Thoughts on Humans and Other Animals

“And with animals, if we approach them in a rational way we shall find a trace of the intelligible in them which is a not unworthy imitation of what is above reason. For if we look at those beings that naturally care for their offspring, we are encouraged to define for ourselves reverently and with godly boldness that God exercises providence in his sovereign uniqueness over all beings.”

Maximus the Confessor (580–662) Christian saint and theologian

“I think using animals for food is an ethical thing to do, but we've got to do it right. We've got to give those animals a decent life and we've got to give them a painless death. We owe the animal respect.”

Temple Grandin (1947) USA-american doctor of animal science, author, and autism activist

“Could we bring ourselves to feel what the first spectators of an Egyptian statue, or a Romanesque crucifixion, felt, we would make haste to remove them from the Louvre. True, we are trying more and more to gauge the feelings of those first spectators, but without forgetting our own, and we can be contented all the more easily with the mere knowledge of the former, without experiencing them, because all we wish to do is put this knowledge to the work of art.”

André Malraux (1901–1976) French novelist, art theorist and politician

“I wish to point out that there was another sphere of intellectual activity in which the Hindus excelled–the meditative and transcendent–and that here we might learn from them some lessons of life which we ourselves are but too apt to ignore or to despise.”

Max Müller (1823–1900) German-born philologist and orientalist

“[I]f suffering is bad for animals when we cause it, it is also bad for them when other animals cause it. That suffering is bad for those who experience it is not a human prejudice; nor is an effort to prevent wild animals from suffering a moralistic attempt to police the behavior of other animals. Even if we are not morally required to prevent suffering among animals in the wild for which we are not responsible, we do have a moral reason to prevent it, just as we have a general moral reason to prevent suffering among human beings that is independent both of the cause of the suffering and of our relation to the victims. The main constraint on the permissibility of acting on our reason to prevent suffering is that our action should not cause bad effects that would be worse than those we could prevent.”

Jeff McMahan (philosopher) (1954) American philosopher

“We, in a spirit of humanity of which I entirely approve, have passed legislation—to which I may say I have without boasting myself contributed very largely—to raise the standard of living amongst our working people, to secure to them higher wages, to save them from the competition of men of a lower social scale. We have surrounded them with regulations which are intended to provide for their safety. We have secured them, or the majority of them, against the pecuniary loss which would follow upon accidents incurred in the course of their employment. There is not one of those things which I have not supported…But they have all entailed expense, they have all raised the cost of production; and what can be more illogical than to raise the cost of production in this country in order to promote the welfare of the working classes, and then to allow the products of other countries—which are not surrounded by any similar legislation, which are free from all similar cost and expenditure—to allow them freely to bring each country in competition with our goods, which are hampered in the struggle?”

Joseph Chamberlain (1836–1914) British businessman, politician, and statesman