It is true that our everyday view of the world is not quite naively realistic, but that is what it would like to be. Common-sense is naively realisti… - C. D. Broad

Although people cannot define existence and do use the term with some looseness, yet it is possible to give an extensive definition by pointing to the sorts of things that everyone believes to exist. It is still easier to point to the sort of entities that people agree in believing not to exist, and happily, this is really what concerns us most. People mean by saying that causation only applies to things that exist that it applies, if at all, to what can change; and they believe that, if anything can change, it is things like chairs and tables and minds, and not those like the propositions of Euclid and the multiplication table. What would be agreed then is that, if causal laws apply to anything it is to what can change in so far as it changes.

It is to be feared that Spinoza would not have been enlightened enough to appreciate the beneficient system of the Ph.D. degree, introduced into English universities as a measure of post-war propaganda, whereby the time and energy of those who are qualified to do research are expended in supervising the work of those who never will be.

Those who, like the present writer, never had the privilege of meeting Sidgwick can infer from his writings, and still more from the characteristic philosophic merits of such pupils of his as McTaggart and Moore, how acute and painstaking a thinker and how inspiring a teacher he must have been. Yet he has grave defects as a writer which have certainly detracted from his fame. His style is heavy and involved, and he seldom allowed that strong sense of humour, which is said to have made him a delightful conversationalist, to relieve the uniform dull dignity of his writing. He incessantly refines, qualifies, raises objections, answers them, and then finds further objections to the answers. Each of these objections, rebuttals, rejoinders, and surrejoinders is in itself admirable, and does infinite credit to the acuteness and candour of the author. But the reader is apt to become impatient; to lose the thread of the argument: and to rise from his desk finding that he has read a great deal with constant admiration and now remembers little or nothing. The result is that Sidgwick probably has far less influence at present than he ought to have, and less than many writers, such as Bradley, who were as superior to him in literary style as he was to them in ethical and philosophical acumen. Even a thoroughly second-rate thinker like T. H. Green, by diffusing a grateful and comforting aroma of ethical "uplift", has probably made far more undergraduates into prigs than Sidgwick will ever make into philosophers.