"Prudence is … more than mere shrewdness. If not tied down to the noble and just ends that one has been habituated to love, the soul's native power of cleverness can lead to the utmost knavery."

“The truths modern science finds—even about human beings—are value-neutral, in no way restraining, and indeed perfectly adapted for, technical application. In short, as Hans Jonas has put it, modern science contains manipulability at its theoretical core—and this remains true even for those great scientists who are themselves motivated by the desire for truth and who have no interest in that mastery over nature to which their discoveries nonetheless contribute and for which science is largely esteemed by the rest of us and mightily supported by the modern state.”

“Francis Bacon, in his New Atlantis, could charge his elite scientists in Salomon’s House with practicing self-censorship to avoid publicizing dangerous knowledge. Here is how the Father of Salomon’s House describes their practice: “We have consultations, which of the inventions and experiences which we have discovered shall be published, and which not: and take all a oath of secrecy for the concealing of those which we think fit to keep secret: though some of those we do reveal sometime to the State, and some not.” Bacon, the first prophet of the new relation between science and society and of the “conquest of nature for the relief of man’s estate,” knew better than we that knowledge is dangerous, that publication is a public and politically relevant act, and that self-censorship on the part of scientists is necessary and desirable. The passage is also remarkable for its wonderful ambiguity regarding whether scientists or the State has ultimate authority over dangerous knowledge”

“science was indeed powerful, but its self-understanding left much to be desired. It knew the human parts in ever-finer detail, but it concerned itself little with the human whole. … The art of healing does not inquire into what health is, or how to get and keep it: The word "health" does not occur in the index of the leading textbooks of medicine. To judge from the way we measure medical progress, largely in terms of mortality ­statistics and defeats of deadly diseases, one gets the unsettling impression that the tacit goal of medicine is not health but rather bodily immortality, with every death today regarded as a tragedy that future medical research will prevent.”

“To act nobly, a noble heart is not enough. It needs help from a sharp mind. Though the beginnings of ethical virtue lie in habituation, starting in our youth, and though the core of moral virtue is the right-shaping of our loves and hates, by means of praise and blame, reward and punishment, the perfection of character finally requires a certain perfection of the mind.”

“Even the modern word "concept" means "a grasping together," implying that the mind itself, in its act of knowing, functions like the intervening hand . And modern science rejects, as meaningless or useless, questions that cannot be answered by the application of method. Science becomes not the representation and demonstration of truth, but an art: the art of finding the truth—or, rather, that portion of truth that lends itself to be artfully found.”

“For most Americans, ethical matters are usually discussed either in utilitarian terms of weighing competing goods or balancing benefits and harms, looking to the greatest good for the greatest number, or in moralist terms of rules, rights and duties, "thou shalts" and "thou shalt nots." Our public ethical discourse is largely negative and "other-directed": We focus on condemning and avoiding misconduct by, or on correcting and preventing injustice to, other people, not on elevating or improving ourselves. How liberating and encouraging, then, to encounter an ethics focused on the question, "How to live?" and that situates what we call the moral life in the larger context of human ­flourishing. How eye-opening are arguments that suggest that happiness is not a state of passive feeling but a life of fulfilling activity, and especially of the unimpeded and excellent activity of our specifically human powers—of acting and making, of thinking and learning, of loving and befriending. How illuminating it is to see the ethical life discussed not in terms of benefits and harms or rules of right and wrong, but in terms of character, and to understand that good character, formed through habituation, is more than holding right opinions or having "good values," but is a binding up of heart and mind that both frees us from enslaving passions and frees us for fine and beautiful deeds. How encouraging it is to read an account of human life—the only such account in our philosophical tradition—that speaks at length and profoundly about friendship, culminating in the claim that the most fulfilling form of friendship is the sharing of speeches and thoughts.”