Explain how the ideas of balance and order were important themes in ancient Greek society and culture. Include citations as necessary, any style you like is fine (ie. MLA, Chacago, etc.). Make sure you have a thesis statement and be sure to use specific examples to support your argument. Careful proofreading and editing will result in better marks on your essay.
Be sure that you include examples and explanation that cover all three fields (arts and humanities, natural sciences and social and political thought) in your essay.