“The end justifies the means” is the famous quote by Machiavelli (Viroli, 1998) which places the emphasis of morality on final results rather than on the actions taken to achieve them. Is this statement true in the field of natural science? Whether the atomic bombings, as a means used to end World War II, justify the deaths of civilians in Hiroshima and Nagasaki? What is the moral limit in acquiring knowledge in the natural sciences? How is art bound by moral judgment? Is it applicable to different works of art? Oscar Wilde stated that “There is no such thing as a moral book or an immoral book. Books are written well or written badly. That's all. (Wilde, 1945). Does this mean that writers should have complete freedom? Or should ethical considerations limit what they say and how they say it? This essay will show that ethical considerations limit the production of knowledge in both art and the natural sciences, and that these types of limitations are present to a greater extent in the natural sciences. Ethical judgment consists of reasoning about the possible alternatives in a situation and judging which alternative is the most ethical. A person making an ethical judgment uses reason to decide which alternative is best for solving a problem or to determine that one alternative is morally right and another alternative is morally wrong. In short, ethical judgment is a process of considering several alternatives and choosing the most ethical one. In the natural sciences there are always ethical rules that limit how knowledge can be produced. In the natural sciences, experimentation is an important method for producing knowledge, but ethical judgments can limit the use of this method. There are areas that are considered unethical... middle of paper....... Kieran, M. (2008, January 28). Art, censorship and morality. Open Learn, the Open University. Retrieved January 5, 2014, from http://www.open.edu/openlearn/history-the-arts/culture/philosophy/art-censorship-and-morality3. Mother and son were separated. (n.d.). Astrup Fearnley Museum. Retrieved January 5, 2014, from http://afmuseet.no/en/samlingen/utvalgte-kunstnere/h/damien-hirst/mother-and-child-divided4. van de Lagemaat, R. (2011) Theory of Knowledge for the IB Diploma, Cambridge University Press.5. Viroli, M. (1998) Machiavelli, London, Oxford University Press, retrieved 3 January 2014 from http://www.questia.com/read/23271960?title=Machiavelli6. Wilde, O. (1945). The photo of Dorian Gray. The Electronic Classics Series, Pennsylvania State University. P. 3/ Retrieved January 3, 2014, from http://www2.hn.psu.edu/faculty/jmanis/oscar-wilde/dorian-gray.pdf