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Most prayers in this room begin with a request to bow your heads. I would like to ask you not to bow your heads. I would like to ask that you take a moment to look around the room at all of the men and women here, in this moment, sharing together this extraordinary experience of being alive and of dedicating ourselves…
We may show that, as it was impossible to make the Latin a vulgar tongue common to all Europe, the continuance of the custom of writing in it upon the sciences would have been attended with a transient advantage only to those who studied them; that the existence of a sort of scientific language among the learned of…
The spirit which animated the reformers did not introduce a real freedom of sentiment. Each religion, in the country in which it prevailed, had no indulgence but for certain opinions. Meanwhile, as the different creeds were opposed to each other, few opinions existed that had not been attacked or supported in some…
The Greek and Roman antiquarians, and even their literati and philosophers, are chargeable with a total neglect of that spirit of doubt which subjects to a rigorous investigation both sacts, and the proofs that establish them. In reading their accounts of the history of events or of manners, of the productions and…
Such is the origin of almost all the religions that are known to us, and which the hypocrisy or the extravagance of their inventors and their proselytes afterwards loaded with new fables. These casts seized upon education, that they might fashion man to a more patient endurance of chains, embodied as it were with his…
The only sciences known to savage hordes, are a slight and crude idea of astronomy, and the knowledge of certain medicinal plants employed in the cure of wounds and diseases; and even these are already corrupted by a mixture of superstition. Meanwhile there is presented to us in this epoch one fact of importance in…
We shall expose the origin and trace the history of general errors, which have more or less contributed to retard or suspend the advance of reason, and sometimes even, as much as political events, have been the cause of man’s taking a retrograde course towards ignorance. Those operations of the mind that lead to or…
In science, one rarely sees all the data point toward one precise conclusion. Real data is noisy—even if the theory is perfect, the strength of the signal will vary. And under Bayes’s theorem, no theory is perfect. Rather, it is a work in progress, always subject to further refinement and testing. This is what…
One property of Bayes’s theorem, in fact, is that our beliefs should converge toward one another—and toward the truth—as we are presented with more evidence over time. In figure 8-8, I’ve worked out an example wherein three investors are trying to determine whether they are in a bull market or a bear market. They…
Scientists are trained to avoid rhetorical arguments, the "vulgar Induction" Bacon warned against, and let the chips of reality fall where they may. They highly prize this intellectual honesty because the stakes for them are very high. They know how value judgments, prejudices, and habits of thought can blind you to…
There is objective truth to be learned by observation, and the knowledge gained gives power that other "ways of knowing" have not. But the more dangerous problem with postmodernist thinking is its a priori nature. Not truth, but a political goal has to be served—in this particular case the goal of openness, or…
The teaching that there is no objective reality, but rather many subjec¬ tive realities, or in this case, that the subjective realities are on an equal par with the objective reality (you're dead!) in turn influences students' views of the primacy of knowledge. To critics, history is no longer the search for what…
We base our understanding of the world on what we can perceive with our senses and comprehend with our minds. Anything that is said to make sense should make sense to us as humans; else there is no reason for it to be the basis of our decisions and actions. Supposed transcendent knowledge or intuitions that are said…
To dissimulate is to pretend not to have what one has. To simulate is to feign to have what one doesn't have. One implies a presence, the other an absence. But it is more complicated than that because simulating is not pretending: "Whoever fakes an illness can simply stay in bed and make everyone believe he is ill…
Perhaps the essence of the Liberal outlook could be summed up in a new decalogue, not intended to replace the old one but only to supplement it. The Ten Commandments that, as a teacher, I should wish to promulgate, might be set forth as follows: 1. Do not feel absolutely certain of anything. 2. Do not think it worth…
[L]et us not overlook the further great fact, that not only does science underlie sculpture, painting, music, poetry, but that science is itself poetic. The current opinion that science and poetry are opposed is a delusion. ... On the contrary science opens up realms of poetry where to the unscientific all is a blank…
Man is no new-begot child of the ape, bred of a struggle for existence upon brutish lines—nor should the belief that such is his origin, oft dinned into his ears by scientists, influence his conduct. Were he to regard himself as an extremely ancient type, distinguished chiefly by the qualities of his mind, and to look…
Science enhances the moral value of life, because it furthers a love of truth and reverence—love of truth displaying itself in the constant endeavor to arrive at a more exact knowledge of the world of mind and matter around us, and reverence, because every advance in knowledge brings us face to face with the mystery…
Conservation is getting nowhere because it is incompatible with our Abrahamic concept of land. We abuse land because we regard it as a commodity belonging to us. When we see land as a community to which we belong, we may begin to use it with love and respect. There is no other way for land to survive the impact of…
At the outset do not be worried about this big question—Truth. It is a very simple matter if each one of you starts with the desire to get as much as possible. No human being is constituted to know the truth, the whole truth, and nothing but the truth; and even the best of men must be content with fragments, with…