“So far I have not said much about objectivity, though earlier chapters have had a good deal to do with it. If an Archimedean point could be found and practical reason, or human interests, could be shown to involve a determinate ethical outlook, then ethical thought would be objective, in the sense that it would have been given an objective foundation. Those are possibilities—or they might have turned out to be possibilities—within the perspective of practical reason. Very often, however, discussions of objectivity come into moral philosophy from a different starting point, from an interest in comparing ethical beliefs with knowledge and claims to truth of other kinds, for instance with scientific beliefs. Here a rather different conception of objectivity is involved. It is naturally associated with such questions as what can make ethical beliefs true, and whether there is any ethical knowledge. It is in this field of comparisons that various distinctions between fact and value are located.”

“All rational knowledge is either material, and concerns some objects, or formal, and is occupied only with the form of understanding and reason itself and with the universal rules of thinking, without regard to distinctions among objects. formal philosophy is called logic. Material philosophy, however, which has to do with definite object objects and the laws to which they are subject, is divided into two parts. This is because these laws are either laws of nature or laws of freedom. The science of the former is called physics, and that of the latter ethics. The former is also called theory of nature and the latter theory of morals.”

“From the ethical point of view, no one can escape responsibility with the excuse that he is only an individual, on whom the fate of the world does not depend. Not only can this not be known objectively for certain, because it is always possible that it will depend precisely on the individual, but this kind of thinking is also made impossible by the very essence of ethics, by conscience and the sense of responsibility.”

“The propounders of what are called the "ethics of evolution," when the 'evolution of ethics' would usually better express the object of their speculations, adduce a number of more or less interesting facts and more or less sound arguments, in favour of the origin of the moral sentiments, in the same way as other natural phenomena, by a process of evolution. I have little doubt, for my own part, that they are on the right track; but as the immoral sentiments have no less been evolved, there is, so far, as much natural sanction for the one as the other. The thief and the murderer follow nature just as much as the philanthropist. Cosmic evolution may teach us how the good and the evil tendencies of man may have come about; but, in itself, it is incompetent to furnish any better reason why what we call good is preferable to what we call evil than we had before.”

“Objectivity works to repel the attacks of critics, like a kind of ethical pepper spray.”

“It is inevitable, therefore, that some approaches to politics, economics, science, and even spirituality and ethics will be objectively better than their competitors (by any measure of "better" we might wish to adopt), and gradations here will translate into very real differences in human happiness.”